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中国精品科技期刊2020

指纹图谱结合化学模式识别评价特定品牌酱香型白酒品质独特性与批次稳定性研究

王丽, 卢君, 唐平, 山其木格, 毕荣宇, 王凡, 郭莹, 李长文

王丽,卢君,唐平,等. 指纹图谱结合化学模式识别评价特定品牌酱香型白酒品质独特性与批次稳定性研究[J]. 食品工业科技,2023,44(9):271−280. doi: 10.13386/j.issn1002-0306.2022040146.
引用本文: 王丽,卢君,唐平,等. 指纹图谱结合化学模式识别评价特定品牌酱香型白酒品质独特性与批次稳定性研究[J]. 食品工业科技,2023,44(9):271−280. doi: 10.13386/j.issn1002-0306.2022040146.
WANG Li, LU Jun, TANG Ping, et al. Evaluation of Quality Uniqueness and Batch Stability of Maotai-flavor Baijiu of Specific Brand by Fingerprint and Chemical Pattern Recognition[J]. Science and Technology of Food Industry, 2023, 44(9): 271−280. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2022040146.
Citation: WANG Li, LU Jun, TANG Ping, et al. Evaluation of Quality Uniqueness and Batch Stability of Maotai-flavor Baijiu of Specific Brand by Fingerprint and Chemical Pattern Recognition[J]. Science and Technology of Food Industry, 2023, 44(9): 271−280. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2022040146.

指纹图谱结合化学模式识别评价特定品牌酱香型白酒品质独特性与批次稳定性研究

基金项目: 贵州省科技成果应用及产业化计划项目(黔科合成果[2020]2Y045);贵州省仁怀市科技计划项目(仁科支撑[2020]04号);遵义市科技计划项目(遵市科合支撑 GY[2021]40号)。
详细信息
    作者简介:

    王丽(1987−),女,博士,副高级工程师,研究方向:酒类风味化学,E-mail:liwangdz@sina.cn

    通讯作者:

    卢君(1985−),男,博士,正高级工程师,研究方向:酒类发酵技术和质量控制,E-mail:lujun951@tasly.com

  • 中图分类号: TS261.7

Evaluation of Quality Uniqueness and Batch Stability of Maotai-flavor Baijiu of Specific Brand by Fingerprint and Chemical Pattern Recognition

  • 摘要: 为建立一种特定品牌酱香型白酒品质独特性及批次稳定性的评价方法。采用气相色谱-质谱联用结合“中药色谱指纹图谱评价系统”,构建特定品牌酱香型白酒指纹图谱,结合相似度与化学模式识别分析(层次聚类、主成分分析)实现对特定品牌酱香型白酒品质独特性与批次稳定性的综合评价。结果表明:以指纹图谱相似度大于0.99作为特定品牌酱香型白酒品质独特性及批次稳定性的评价标准,可将特定品牌酱香型白酒与其他不同品牌酱香型白酒有效区分;化学模式识别均显示特定品牌酱香型白酒与其他不同品牌酱香型白酒明显分类;可见指纹图谱结合化学模式识别可有效评价特定品牌酱香型白酒的批次稳定性及品质独特性。主成分分析发现特定品牌酱香型白酒与其他品牌酱香型白酒差异物质为17种,包括己酸、己酸乙酯、正己醇、乙酸、苯乙酸乙酯、2-羟基丙酸乙酯、十六烷酸乙酯、丁酸、3-甲基丁醇、2-甲基丙醇、乙酸正丙酯、正丙醇、2-丁醇,2-甲基丙酸乙酯、3-甲基丁酸乙酯、丙酸乙酯、正丁醇,是特定品牌酱香型白酒品质独特性的内在体现。本研究为特定品牌酱香型白酒的质量控制提供了一定的理论依据和技术支撑。
    Abstract: This study aimed to establish an evaluation method for quality uniqueness and batch stability of Maotai-flavor Baijiu of specific brand. In this study, Gas chromatography-mass spectrometry (GC-MS) and similarity evaluation system for chromatographic fingerprints of TCM were used to establish a fingerprint of Maotai-flavor Baijiu of specific brand. As well as, comprehensive evaluation quality uniqueness and batch stability of Maotai-flavor Baijiu of specific brand was conducted based on similarity evaluation and chemical pattern recognition (hierarchical clustering and principal component analysis). The results showed that evaluation standard for quality uniqueness and batch stability of Maotai-flavor Baijiu of specific brand was fingerprint similarity greater than 0.99, which could effectively distinguish Maotai-flavor Baijiu of specific brand from other brands. The results of chemical pattern recognition showed that Maotai-flavor Baijiu of specific brand and other brands of Maotai-flavor Baijiu were obviously classified. Thus, the quality uniqueness and batch stability of Maotai-flavor Baijiu of specific brands could be effectively evaluated by the fingerprint similarity and chemical pattern recognition. 17 substances were found by principal component analysis, which caused the difference between Maotai-flavor Baijiu of specific brand and other brands. Hexanoic acid, hexanoic acid, ethyl ester, 1-hexanol, acetic acid, benzeneacetic acid, ethyl ester, propanoic acid, 2-hydroxy-, ethyl ester, hexadecanoic acid, ethyl ester, butanoic acid, 1-butanol, 3-methyl-, 1-propanol, 2-methyl-, n-propyl acetate, 1-propanol, 2-butanol , propanoic acid, 2-methyl-, ethyl ester, butanoic acid, 3-methyl-, ethyl ester, propanoic acid, ethyl ester, 1-butanol were included. These substances were the inherent embodiment of Maotai-flavor Baijiu of specific brand uniqueness. This study provides theoretical basis and technical support for the quality control of Maotai-flavor Baijiu of specific brand.
  • 随着酱香型白酒市场愈发火爆,迫切需要企业建立科学有效的产品品质评价方法,这对企业自身进行白酒质量控制,规范酱香型白酒行业与市场具有重要意义。白酒质量控制目前主要涉及有害物质(重金属、农残、塑化剂、真菌毒素等)[1-4]、异杂味[5-7]、白酒年份酒[8-10]、名优白酒真伪鉴别[11-13]、白酒原料及酿造副产物[14-15]、纯粮固态白酒识别[16-17]等方面,鲜有对白酒批次稳定性的研究报道。本文针对特定品牌酱香白酒,建立其批次稳定性评价方法,以期为企业产品放行提供技术指导。与此同时,对该产品的品质独特性进行研究,剖析产品内涵,以科学的数据为产品赋能。

    指纹图谱技术源于中药质量控制研究,在食品领域也被广泛应用,李茜云等[18]采用气相色谱-质谱联用技术检测料酒中的风味物质,利用中药色谱指纹图谱相似度评价系统提取共有峰信息,建立料酒风味物质的标准指纹图谱,采用夹角余弦法和相关系数法计算料酒的相似度,利用标准指纹图谱的特征峰检测未知料酒样品并推断是否归属该典型品牌料酒;白酒行业也有很多指纹图谱的研究报道,马龙利等[19]采用HS-SPME结合GC-MS法建立金沙窖酒指纹图谱,通过相似度计算并结合聚类分析初步建立了金沙窖酒鉴别的指纹图谱技术。先春等[20]采用气相色谱结合“中药色谱指纹图谱相似度评价系统”软件建立2种不同工艺和2种不同风格酱香型白酒香气成分指纹图谱,同时对不同样品之间的相似度进行评价。孙其然等[21]应用GC-MS技术建立了贵州茅台酒的指纹图谱,并确定了其中的35种组分作为茅台酒的共有特征组分,但所建立的指纹图谱无法有效区分与贵州茅台酒具有相同酒精度的酱香型白酒。以指纹图谱方法结合化学模式识别最为前沿,化学模式识别作为化学计量学的重要组成部分,是将原始数据集中差异性信息提取并分类的化学计量学手段[22],能够较好地迎合指纹图谱整体性和模糊性的要求,分为无监督模式识别方法和有监督模式识别方法2类[23-24],其中无监督的模式识别方法包括聚类分析(cluster analysis, CA)、主成分分析(principal component analysis, PCA)等。有监督的模式识别方法包括判别分析(discriminant analysis, DA)、偏最小二乘法-判别分析(partial least squares discriminant analysis, PLS-DA)、人工神经网络(artificial neural networks, ANNs)等。胡雪等[25]采用GC-MS结合化学计量学手段实现了不同品牌浓香型白酒的快速分类和鉴别。赵丽丽等[26]采用GC-MS指纹图谱及化学模式识别分析河南不同产地香椿挥发性成分,为香椿的快速溯源及品质监控提供一定的理论依据。可见,应用指纹图谱技术结合化学模式识别可快速、有效的对食品(包括酒类产品)进行质量控制研究。本文研究对象为白酒产品,GC-MS技术能够很好将白酒中量小味大的风味物质(重要风味物质)信息呈现出来,指纹图谱技术相似度计算可以从白酒物质组成整体性出发对白酒的品质进行区分,化学模式识别能够为仪器分析获得的庞大复杂的量测信息提供便利的研究手段,与指纹图谱技术相投合。因此,本文将GC-MS指纹图谱技术结合化学模式识别应用于特定品牌酱香型白酒的质量控制研究中具有一定的可行性与科学性。

    本文以不同批次特定品牌酱香型白酒为主要研究对象,采用气相色谱-质谱联用指纹图谱技术,构建特定品牌酱香型白酒气质联用指纹图谱,结合相似度评价及化学模式识别分析,以期探索和建立一种特定品牌酱香型白酒品质独特性与批次稳定性评价方法。本研究为特定品牌酱香型白酒质量控制提供了一定的理论依据和技术支撑。

    12个批次特定品牌酱香型白酒(S1~S12)、其他品牌酱香型白酒(MT、DYT、LJ、XJ、JS) 均通过市售或酒厂之间标准酒样交换的方式获得,其中贵州省仁怀市茅台镇8种酒样(MT1~4、DYT1~4),四川省古蔺县二郎镇5种酒样(LJ1~5),贵州省习水县习酒镇4种酒样(XJ1~4),贵州省毕节市金沙县4种酒样(JS1~4),所有酒样酒精度均为53%;二氯甲烷 色谱纯,Supelco;2-乙基丁酸 99.5%,天津光复精细化工研究所;氯化钠 分析纯,麦克林;乙醇 色谱纯,默克;盐酸 分析纯,天津市风船化学试剂科技有限公司。

    Thermo-Trace 1310-ISQ 气相色谱质谱联用仪(配有离子源为EI源) 美国赛默飞公司;Vortex-Genie 2涡旋振荡仪 美国SI。

    样品制备[27]:取5 mL白酒样品,15 mL超纯水,50 μL内标,混匀,然后加入2.0 mg NaCl,2 mL二氯甲烷,涡旋振荡至NaCl完全溶解;静置20 min后,取上层作为供试品溶液。内标配制方法:精确量取50 μL 2-乙基丁酸标准品溶液,置于50 mL容量瓶中,53%色谱乙醇定容。逐滴加入稀盐酸将53%色谱乙醇调节pH至3。

    色谱柱选择:采用安捷伦极性色谱柱 HP-FFAP(50 m×0.2 mm×0.33 μm),该柱适用于分析有机酸、酯、醛、酮等物质。

    气相色谱-质谱联用检测参数:质谱离子源为EI源,全扫描模式,离子源温度250 ℃,质谱传输线温度250 ℃,气相色谱前进样口250 ℃,前检测器250 ℃,柱流量1 mL/min,进样量1 μL;分流模式,分流比10:1;升温程序(共54.29 min):初始40 ℃,保持2 min,以3.5 ℃/min升至90 ℃,以5 ℃/min升至230 ℃保持10 min。

    定性分析、定量分析方法:通过NIST谱库检索并结合标准品标准图谱比对进行定性分析。通过公式:待测物相对含量=待测物峰面积/内标峰面积×内标质量浓度,进行待测物质的相对含量计算。

    精密度试验:取同一酱香型白酒供试样品,按照1.2.1项条件,连续进样5次,计算各共有峰相对保留时间和相对峰面积的相对标准偏差(relative standard deviation,RSD)。

    稳定性试验:取同一酱香型白酒供试样品,按照1.2.1项条件,分别于0、4、12、18、24 h进样,计算各共有峰相对保留时间和相对峰面积的RSD。

    重复性试验:取同一酱香型白酒供试样品,平行准备5份供试品,按照1.2.1项条件,计算各共有峰相对保留时间和相对峰面积的RSD。

    使用中药色谱指纹图谱评价系统(中国药典委员会2012版)生成对照指纹谱;使用Simca P(Umetrics,13.0)进行化学计量学分析;使用SPSS23分析实验数据,各实验均重复3次。

    将样品按照GC-MS测试供试品方法制备后,连续进样5次,以内标峰作为参照峰,计算得到共有峰相对保留时间的RSD<0.2%,相对峰面积的RSD<6.00%,表明检测系统的进样精密度良好;将样品按照供试品方法处理后分别在0、4、12、18、24 h依次进行检测,以保留时间2-乙基丁酸峰作为参照峰,计算得到共有峰相对保留时间的相对标准偏差RSD<0.2%,相对峰面积的RSD<6.00%,表明样品溶液在24 h内稳定;将样品按照供试品方法平行处理5份,连续进样5次,以2-乙基丁酸峰作为参照峰,计算得到共有峰相对保留时间的相对标准偏差RSD<4%,相对峰面积的RSD<10.00%,表明其重复性试验较好。具体结果见表1

    表  1  GC-MS方法学考察
    Table  1.  GC-MS methodology investigation
    编号保留时间(min)物质名称精密度稳定性重复性
    相对峰面积RSD(%)相对保留时间RSD(%)相对峰面积RSD(%)相对保留时间RSD(%)相对峰面积RSD(%)相对保留时间RSD(%)
    16.98丙酸乙酯a1.60130.10161.80070.13211.73280.1996
    27.122-甲基丙酸乙酯a1.19270.11802.00950.12091.74400.1497
    37.35乙酸丙酯a2.79180.07482.22460.08172.69250.0966
    48.612-丁醇a1.44990.06383.90360.05950.95380.0824
    59.07正丙醇a1.15170.04971.73570.05671.45460.0393
    69.502-甲基丁酸乙酯1.41490.04741.48880.05390.74440.0375
    710.073-甲基丁酸乙酯a0.72830.04480.95690.03051.29040.0354
    810.732-甲基丙醇a1.64550.00002.22160.01431.61660.0433
    911.97正丁醇a1.62690.03551.70150.03981.45560.0424
    1012.42戊酸乙酯a0.58630.00000.80650.02200.74950.0420
    1114.252-庚酮1.41870.03861.68130.01732.60860.0000
    1215.073-甲基丁醇a1.03280.00001.73550.01431.69340.0495
    1316.14己酸乙酯a0.63080.02781.22890.03111.55040.0220
    1416.67正戊醇0.63190.03301.72420.01271.31260.0213
    1520.212-羟基丙酸乙酯a0.77340.02722.81890.01431.13500.0265
    1620.31正己醇a0.53150.00001.16830.00781.05760.0256
    1722.132-羟基丁酸乙酯1.93040.02481.75320.02301.72350.0160
    1822.2三甲基吡嗪5.06420.00004.63520.02244.30430.0159
    1922.92辛酸乙酯0.35590.00001.82600.02111.65760.0203
    2023.62乙酸a1.35390.00001.67950.00483.61020.0150
    2124.26糠醛a0.68000.00001.49000.01431.08000.0214
    2225.40乙酰呋喃3.61940.00003.57380.02052.94300.0140
    2325.97苯甲醛0.80880.00001.75220.00300.88750.0179
    2428.33丁酸a1.10940.00000.57920.00161.02540.0000
    2529.55丁二酸二乙酯0.94540.00000.82550.01801.04350.0157
    2630.58(2,2-二乙氧基乙基)-苯2.77360.01790.84050.00043.07690.0000
    2730.98戊酸0.79960.00000.89700.01761.30990.0000
    2832.32苯乙酸乙酯a1.31210.00001.58340.00041.30710.0000
    2933.40己酸a0.90110.01341.18810.01701.34780.0160
    3034.53苯丙酸乙酯2.73030.01591.58260.00132.51150.0000
    3135.13苯乙醇a1.15850.00001.57120.01630.94760.0101
    3241.44棕榈酸乙酯a5.17050.01115.61470.01078.56983.5145
    注:a代表特征成分,表2同。
    下载: 导出CSV 
    | 显示表格

    采用GC-MS对12个不同批次特定品牌酱香型白酒进行检测,选择不同批次特定品牌酱香型白酒共有的色谱峰,以总峰面积占比大于0.04%,质谱数据库正检索、逆检索相似系数>900,匹配率>80%和差谱分析为依据,筛选得到特定品牌酱香型白酒GC-MS共有峰32种。32种共有峰总峰面积占比之和>88%,以总峰面积占比>0.5%为选择依据,从32个共有峰中筛选出20种特定品牌酱香型白酒特征峰(总峰面积占比之和>86%),不同批次特定品牌酱香型白酒共有的色谱峰总峰面积占比见表2

    表  2  特定品牌酱香型白酒 GC-MS 共有成分的总峰面积占比
    Table  2.  Ratio of total peak area of common substances of Maotai-flavor Baijiu of specific brand based on GC-MS
    编号保留时间
    (min)
    物质名称总峰面积占比(%)
    S1S2S3S4S5S6S7S8S9S10S11S12
    16.98丙酸乙酯a3.950±0.01414.495±0.03543.895±0.00713.220±0.01412.595±0.02122.735±0.00712.800±0.04242.660±0.02832.505±0.00712.220±0.01412.335±0.00712.345±0.0071
    27.122-甲基丙酸乙酯a1.395±0.00711.355±0.00711.375±0.00711.335±0.00711.015±0.00711.095±0.00711.000±0.01411.115±0.03541.210±0.00001.040±0.01411.050±0.00001.045±0.0071
    37.35乙酸丙酯a1.010±0.00000.9300±0.00001.000±0.00000.4300±0.0000.6800±0.00000.7900±0.00001.375±0.00711.375±0.02120.4750±0.00710.6350±0.00710.6100±0.00000.6350±0.0354
    48.612-丁醇a1.025±0.00710.8800±0.00001.020±0.00000.6350±0.00710.9100±0.01410.9050±0.00711.000±0.00000.9300±0.01410.6600±0.00001.305±0.00711.245±0.02121.235±0.0071
    59.07正丙醇a15.02±0.176814.58±0.035415.06±0.106114.56±0.367712.20±0.042412.70±0.056615.33±0.091914.22±0.21929.960±0.000014.37±0.035411.97±0.042413.825±0.0636
    69.502-甲基丁酸乙酯0.3500±0.00000.3600±0.00000.3450±0.00710.3300±0.00000.2600±0.0000.2650±0.00710.2500±0.00000.2350±0.00710.2750±0.00710.3150±0.00710.2850±0.00710.2750±0.0071
    710.073-甲基丁酸乙酯a0.9650±0.00711.005±0.00710.9400±0.0000.9750±0.00710.7650±0.00710.7800±0.00000.700±0.00000.6900±0.01410.8700±0.00000.9400±0.01410.8400±0.00000.8350±0.0071
    810.732-甲基丙醇a2.935±0.02122.865±0.00712.925±0.00713.140±0.01413.000±0.04243.035±0.00712.980±0.01412.760±0.04242.835±0.00713.010±0.02832.940±0.00002.905±0.0495
    911.97正丁醇a1.480±0.01411.425±0.00711.465±0.00711.890±0.01412.520±0.02832.525±0.00712.335±0.00712.190±0.02832.095±0.00711.875±0.00712.240±0.00002.385±0.2051
    1012.42戊酸乙酯a1.415±0.00711.350±0.00001.380±0.00001.150±0.00001.035±0.00711.000±0.00000.9750±0.00710.9750±0.00711.055±0.00710.9950±0.00711.025±0.00711.030±0.0141
    1114.252-庚酮0.0300±0.00000.0300±0.00000.0300±0.00000.0200±0.00000.0200±0.00000.0200±0.00000.0200±0.00000.0200±0.00000.0250±0.00710.0300±0.00000.0500±0.00000.0500±0.0000
    1215.073-甲基丁醇a16.23±0.007115.41±0.000015.92±0.021215.68±0.021214.47±0.014114.16±0.049514.09±0.028313.06±0.141414.30±0.042415.35±0.007115.58±0.09915.16±0.502
    1316.14己酸乙酯a4.410±0.04244.020±0.02834.322±0.04244.195±0.00714.485±0.00714.270±0.02834.050±0.02834.130±0.01414.240±0.00003.535±0.02123.985±0.03543.650±0.4384
    1416.67正戊醇0.3650±0.00710.3550±0.00710.3552±0.00710.3650±0.00710.3800±0.00000.3600±0.00000.3700±0.00000.3450±0.00710.365±0.00710.3250±0.00710.3650±0.00710.3550±0.0212
    1520.212-羟基丙酸乙酯a16.88±0.106117.25±0.049516.52±0.000018.54±0.028318.85±0.035419.13±0.070718.41±0.063616.66±0.091917.50±0.127318.84±0.035418.34±0.077819.04±0.9192
    1620.31正己醇a1.070±0.00001.060±0.00001.020±0.00001.215±0.00711.410±0.01411.350±0.01411.310±0.00001.235±0.02121.285±0.00711.065±0.00711.190±0.00001.100±0.1273
    1722.132-羟基丁酸乙酯0.0300±0.00000.0200±0.00000.0300±0.00000.0250±0.00710.0200±0.00000.0200±0.00000.0200±0.00000.0200±0.00000.0200±0.00000.0300±0.00000.0200±0.00000.0215±0.0021
    1822.2三甲基吡嗪0.1850±0.00710.1550±0.00710.1800±0.00000.1450±0.00710.1200±0.01410.1000±0.00000.1000±0.00000.0900±0.00000.1250±0.00710.1350±0.00710.1400±0.00000.1300±0.0141
    1922.92辛酸乙酯0.2250±0.00710.2400±0.00000.2250±0.00710.2000±0.00000.1800±0.00000.1700±0.00000.1600±0.00000.1750±0.00710.2300±0.00000.2550±0.00710.3300±0.00000.3350±0.0071
    2023.62乙酸a1.255±0.04951.265±0.00711.290±0.04241.355±0.00711.245±0.03541.395±0.00711.335±0.00711.260±0.00001.310±0.01411.220±0.02831.490±0.01411.580±0.1131
    2124.26糠醛a10.59±0.014110.74±0.000010.19±0.035413.18±0.127314.10±0.077814.29±0.056612.51±0.084911.75±0.169711.24±0.08499.810±0.02839.365±0.04959.035±0.5162
    2225.40乙酰基呋喃0.1300±0.00000.1200±0.00000.1200±0.00000.1350±0.00710.1400±0.00000.1450±0.00710.1400±0.0000.1300±0.00000.1300±0.00000.1300±0.00000.1300±0.00000.1250±0.0071
    2325.97苯甲醛0.4750±0.00710.4850±0.00710.4600±0.00000.4800±0.00000.5100±0.00000.500±0.00000.4400±0.00000.4150±0.00710.4700±0.00000.4150±0.00710.4050±0.00710.4000±0.0141
    2428.33丁酸a1.150±0.01411.115±0.00711.130±0.00001.115±0.00711.085±0.00711.070±0.00001.030±0.00000.9500±0.01411.055±0.00711.050±0.00001.190±0.01411.270±0.0990
    2529.55丁二酸二乙酯0.3900±0.00000.3500±0.00000.3750±0.00710.3600±0.00000.2800±0.00000.2700±0.00000.2600±0.00000.2300±0.00000.2700±0.00000.2600±0.00000.2300±0.00000.2250±0.0071
    2630.58(2,2-二乙氧 基乙基)-苯0.0500±0.00000.0300±0.00000.0500±0.00000.0700±0.00000.0750±0.00710.0800±0.00000.0950±0.00710.1200±0.00000.0850±0.00710.0600±0.00000.0800±0.00000.0750±0.0071
    2730.98戊酸0.4200±0.00000.3900±0.00000.4100±0.00000.3400±0.00000.3200±0.00000.295±0.00710.3000±0.00000.2750±0.00710.3100±0.0000.2900±0.00000.3400±0.00000.3500±0.0141
    2832.32苯乙酸乙酯a0.5900±0.01410.5400±0.00000.5750±0.00710.5450±0.00710.4650±0.00710.4400±0.00000.4050±0.00710.3850±0.00710.4450±0.00710.4500±0.00000.3950±0.00710.3850±0.0071
    2933.40己酸a2.030±0.00001.805±0.00711.955±0.00711.920±0.00002.080±0.01411.925±0.00711.850±0.01411.770±0.02831.850±0.00001.480±0.00001.895±0.00711.805±0.1344
    3034.53苯丙酸乙酯0.0600±0.00000.0550±0.00710.0550±0.00710.05±0.00000.0400±0.00000.0400±0.00000.0400±0.00000.0400±0.00000.0400±0.00000.0500±0.00000.0300±0.00000.0300±0.0000
    3135.13苯乙醇a1.560±0.00001.520±0.00001.500±0.00001.495±0.00711.355±0.00711.300±0.00001.250±0.00001.155±0.02121.390±0.01411.380±0.01411.790±0.00001.720±0.0990
    3241.44十六烷酸乙酯a0.8250±0.02121.040±0.00000.8750±0.00711.025±0.00710.8400±0.01410.7650±0.00710.9150±0.00710.9100±0.01410.9700±0.01410.9550±0.00710.9050±0.02120.9400±0.0141
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    将12个不同批次特定品牌酱香型白酒全部成分保留时间和峰面积数据导入“中药色谱指纹图谱评价系统(中国药典委员会2012版)”进行图谱分析,在生成对照的工作状态,以S1作为参照谱,时间宽度设为0.1 s,将20个特征峰保留时间进行多点校正,然后自动匹配,生成12个批次特定品牌酱香型白酒的GC-MS对照指纹图谱(R),如图1所示。继而计算相似度,如表3所示,12批次特定品牌酱香型白酒GC-MS指纹图谱相似度在0.996~0.998之间,相似度均大于0.99说明12批次特定品牌酱香型白酒在化学成分上差异较小且批次间稳定性较好。因此认为GC-MS标准指纹图谱(R)能够有效地表述特定品牌酱香型白酒挥发性特征成分信息,将相似度>0.99作为特定品牌酱香型白酒品质独特性及批次稳定性的评价标准。进而以特定品牌酱香型白酒GC-MS 对照指纹图谱(R)为参照,以20种特征峰进行多点校正,将不同品牌酱香型白酒与特定品牌酱香型白酒进行自动匹配及相似度计算,结果见表3,研究发现其他不同品牌酱香型白酒与特定品牌酱香型白酒的相似度均<0.99。

    图  1  特定品牌酱香型白酒GC-MS谱图及对照指纹谱
    Figure  1.  GC-MS chromatogram of Maotai-flavor Baijiu of specific brand and control fingerprint
    表  3  基于特定品牌酱香型白酒GC-MS 指纹图谱相似度计算结果
    Table  3.  Similarity results based on GC-MS fingerprint of Maotai-flavor Baijiu of specific brand
    样品编号相似度样品编号相似度样品编号相似度
    S10.997S120.997LJ20.964
    S20.997LJ40.922LJ30.943
    S30.997DYT10.951LJ50.934
    S40.996DYT20.947MT10.946
    S50.998DYT30.956MT20.933
    S60.998DYT40.954MT30.901
    S70.998JS10.926MT40.907
    S80.998JS20.938XJ10.975
    S90.998JS30.952XJ20.971
    S100.998JS40.937XJ30.973
    S110.998LJ10.928XJ40.975
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    表3中不同品牌酱香型白酒相似度结果进行方差分析,结果见表4,发现特定品牌酱香型白酒相似度与其他品牌酱香型白酒相似度之间有显著性差异(P<0.05)。

    表  4  相似度方差分析
    Table  4.  Variance analysis of similarity
    品牌相似度
    S0.9975a
    XJ0.9735b
    DYT0.952c
    JS0.93825c
    LJ0.9382c
    MT0.92175d
    注:同列不同小写字母表示差异显著(P<0.05)。
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    “中药色谱指纹图谱评价系统”采用夹角余弦法进行相似度的计算,夹角余弦法具有峰面积较大的峰的变化对整体相似度的影响较大,对比例较小的成分不敏感的特点,因此本文得到的相似度均较高,但是并不影响对于特定品牌酱香型白酒品质独特性及批次稳定性的判定,即利用GC-MS结合“中药色谱指纹图谱评价系统”可有效区分具有品质独特性及批次稳定性的特定品牌酱香型白酒与其他品牌酱香型白酒,特别的是,利用该方法能够将特定品牌酱酒与具有相同酒精度产自贵州当地的酱香型白酒进行明显区分。有学者报道[21]应用 GC-MS 技术建立贵州茅台酒的指纹图谱,并确定35种特征组分,但利用其所建立的指纹图谱无法有效区分与贵州茅台酒具有相同酒精度的酱香型白酒。本文GC-MS测试酒样经过一定前处理,对挥发性风味成分提取更加充分并且起到一定的富集作用,更加有利于在GC-MS谱图有效的寻找特征成分,且特征成分是否具有代表性对于指纹图谱的有效性至关重要。

    层次聚类分析是一种常用的指纹图谱质量评价方法,适用于对大批量样本进行快速分类或身份识别。将不同批次特定品牌酱香型白酒及其他不同品牌酱香型白酒20种特征物质相对定量结果(见表5)作为变量,得到数据集导入 SIMCA13.0 ,运用单链接欧几里德距离测度的方式进行HCA分析,结果见图2,当类间距为3.68时,不同批次特定品牌酱香型白酒 S1~S12聚为一类,其他品牌酒聚为另一类。表明特定品牌酱香型白酒与其他品牌酱香型白酒存在较大差异,且特定品牌酱酒与相同酒精度产自贵州当地的酱香型白酒进行明显区分,与相似度评价结果一致。

    表  5  特定品牌酱香型白酒 GC-MS 特征成分的相对含量
    Table  5.  Relative content of characteristic substances of Maotai-flavor Baijiu of specific brand based on GC-MS
    编号保留时间
    (min)
    物质名称相对含量(g/L)
    S1S2S3S4S5S6S7S8S9S10S11S12
    16.98丙酸乙酯0.0576±0.00070.0644±0.00070.0582±0.00060.0464±0.00010.0407±0.00010.0428±0.00010.0457±0.00080.0454±0.00050.0393±0.00070.3862±0.00130.0391±0.00020.0352±0.0057
    27.122-甲基丙酸乙酯0.0203±0.00030.0194±0.00000.0206±0.00000.0193±0.00020.0159±0.00020.0171±0.00010.0164±0.00030.0183±0.00170.0186±0.0010.0177±0.00010.0175±0.00010.0152±0.0034
    37.35乙酸丙酯0.0147±0.00020.0133±0.00010.015±0.00020.0062±0.00010.0106±0.00010.0123±0.00010.0224±0.00020.0235±0.00040.0074±0.00020.0104±0.00020.0102±0.00000.0099±0.0003
    48.612-丁醇0.0149±0.00020.0126±0.00010.0153±0.00020.0091±0.00020.0143±0.00030.0141±0.00020.0163±0.00000.0162±0.00040.0105±0.00010.0217±0.00080.0209±0.00030.0202±0.0006
    59.07正丙醇0.2191±0.00440.2089±0.00110.2252±0.00390.1546±0.00140.1913±0.00190.1983±0.00090.2499±0.00110.2462±0.00420.1576±0.00010.2385±0.00840.2002±0.00010.202±0.0027
    610.073-甲基丁酸乙酯0.0141±0.00020.0144±0.00010.0141±0.00010.014±0.00010.012±0.00000.0122±0.00000.0114±0.00010.0117±0.00040.0135±0.00050.0156±0.00040.014±0.00010.0124±0.0023
    710.732-甲基丙醇0.0428±0.00070.041±0.00000.0438±0.00040.0452±0.00030.047±0.00090.0474±0.00010.0486±0.00020.0478±0.00080.045±0.00040.05±0.00210.0491±0.00010.0458±0.0047
    811.97正丁醇0.0216±0.00040.0204±0.00020.0219±0.00030.0272±0.00020.0396±0.00070.0394±0.00020.0381±0.00000.0378±0.00050.0334±0.00050.0312±0.00090.0374±0.00000.0375±0.0000
    912.42戊酸乙酯0.0206±0.00040.0193±0.00010.0207±0.00020.0166±0.00010.0163±0.00000.0156±0.00010.0159±0.00010.0164±0.00050.0163±0.00060.0165±0.00040.0172±0.00010.0254±0.0117
    1015.073-甲基丁醇0.2368±0.00210.2209±0.00060.238±0.00220.226±0.00070.2269±0.00130.2211±0.00080.2297±0.00090.2259±0.00320.2281±0.0030.2547±0.00830.2605±0.00080.2395±0.0289
    1116.14己酸乙酯0.0643±0.00120.0576±0.00050.0646±0.00010.0605±0.00000.0704±0.00030.0667±0.00040.066±0.00070.0694±0.00280.0654±0.0030.0586±0.00150.0666±0.00030.0579±0.012
    1220.212-羟基丙酸乙酯0.2462±0.00360.2472±0.00150.2471±0.00260.2673±0.00000.2955±0.00150.2988±0.00090.3001±0.00040.2897±0.00660.282±0.0090.3126±0.00950.3065±0.00230.2997±0.0119
    1320.31正己醇0.0156±0.00020.0152±0.00000.0153±0.00020.0175±0.00010.0221±0.00000.0211±0.00020.0214±0.00000.0212±0.00020.0203±0.00010.0177±0.00040.02±0.00010.0175±0.0036
    1423.62乙酸0.0183±0.00090.0182±0.00020.0193±0.00080.0195±0.00010.0196±0.00040.0217±0.00010.0218±0.00010.0217±0.00000.0206±0.00030.0203±0.00110.0249±0.00030.0248±0.0004
    1524.26糠醛0.1545±0.00140.154±0.00040.1523±0.00110.19±0.00150.221±0.00020.2232±0.00080.204±0.00170.2022±0.00190.1787±0.00170.1628±0.00470.1566±0.00130.1429±0.0206
    1628.33丁酸0.0168±0.00040.016±0.00010.0169±0.00020.0161±0.00010.017±0.00010.0167±0.00000.0168±0.00000.0164±0.00010.0167±0.00010.0174±0.00060.0199±0.00040.0209±0.0012
    1732.32苯乙酸乙酯0.0086±0.00020.0077±0.00000.0086±0.00000.0079±0.00010.0073±0.00010.0069±0.00000.0067±0.00010.0066±0.00010.0069±0.00020.0075±0.00030.0066±0.00000.0061±0.0007
    1833.40己酸0.0296±0.00030.0259±0.00020.0292±0.00040.0277±0.00000.0326±0.00000.0301±0.00000.0302±0.00010.0303±0.00030.0292±0.00010.0246±0.00070.0317±0.00020.0286±0.0045
    1935.13苯乙醇0.0227±0.00020.0218±0.00010.0224±0.00020.0215±0.00010.0212±0.00020.0203±0.00010.0203±0.00000.0199±0.00020.0221±0.00020.0229±0.00050.0299±0.00000.0255±0.0062
    2041.44十六烷酸乙酯0.012±0.00040.0149±0.00010.0131±0.00010.0148±0.00010.0131±0.00030.0119±0.00010.0149±0.00000.005±0.00840.0049±0.00790.0006±0.00000.0579±0.00060.0517±0.0093
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    图  2  不同白酒的聚类分析树状图
    Figure  2.  Cluster analysis dendrogram of different Baijiu

    将不同批次特定品牌酱香型白酒与不同品牌酱香型白酒样本20种共有色谱峰相对定量数据(表1)导入SIMCA13.0 软件建立数据集,经归一化后自动拟合生成PCA模型,以特征值均大于1为提取标准,共确定5个主成分,如表6所示,其累计方差贡献率达到86%,说明前5个主成分综合了不同品牌酱香型白酒20种共有成分86%的信息,符合PCA分析条件。PCA得分图如图3所示,以散点距离分,不同批次特定品牌酱香型白酒S1~S12相较于其他样品较为接近,明显聚为1类,与其他不同品牌酱香型白酒明显分类,包括与具有相同酒精度产自贵州当地的酱香型白酒。对不同批次特定品牌酱香型白酒与不同品牌酱香型白酒样本进行综合评价,利用SPSS软件计算得到主成分得分系数矩阵(表7),以绝对值大小为评价依据。用主成分得分系数矩阵除以各成分特征值的开平方根得到其主成分的权重,其成分得分为各成分权重乘以标准化数据之后的总和。以主成分方差贡献率为权重系数,综合得分为主成分得分乘相应的权重系数之和与累计方差贡献率之比。综合得分排名见表8,12批次特定品牌酱香型白酒可归为一类(综合得分≥4.5),其他品牌酱香型白酒可归于另一类(综合得分<4.5),与相似度评价结果一致。

    表  6  主成分总方差解释
    Table  6.  Principal component total variance explained
    主成分方差贡献率方差累计贡献率特征值
    10.300.305.95
    20.250.555.07
    30.140.692.80
    40.100.791.96
    50.070.861.35
    下载: 导出CSV 
    | 显示表格
    图  3  基于GC-MS的主成分分析
    Figure  3.  PCA based on GC-MS
    表  7  主成分得分系数矩阵
    Table  7.  Principal component score coefficient matrix
    特征物质主成分1主成分2主成分3主成分4主成分5
    丙酸乙酯−0.150.190.450.42−0.52
    2-甲基丙酸乙酯0.62−0.120.150.72−0.16
    乙酸丙酯0.480.080.76−0.200.12
    2-丁醇−0.16−0.120.80−0.140.44
    正丙醇0.300.410.790.070.20
    3-甲基丁酸乙酯0.16−0.530.030.720.09
    2-甲基丙醇0.29−0.73−0.360.190.29
    戊酸乙酯−0.620.580.040.38−0.16
    正丁醇0.430.55−0.390.060.54
    3-甲基丁醇−0.23−0.85−0.180.160.09
    己酸乙酯−0.880.31−0.070.260.10
    2-羟基丙酸乙酯0.520.75−0.200.050.11
    正己醇−0.860.12−0.180.230.31
    乙酸0.860.170.020.300.13
    糠醛0.590.30−0.50−0.070.06
    丁酸0.210.78−0.190.260.05
    苯乙酸乙酯0.76−0.26−0.16−0.09−0.36
    己酸−0.870.38−0.050.210.11
    苯乙醇0.25−0.600.180.330.31
    十六烷酸乙酯0.390.840.000.12−0.01
    下载: 导出CSV 
    | 显示表格
    表  8  主成分得分、综合得分及排名
    Table  8.  Principal component scores, comprehensive scores and rankings
    编号主成分1主成分2主成分3主成分4主成分5综合得分排名
    S97.337.930.117.148.315.421
    S47.207.33−1.098.067.725.122
    S77.387.78−2.087.198.145.103
    S87.397.72−2.147.148.125.084
    S106.736.620.627.587.634.985
    S26.366.760.838.346.674.946
    S67.037.63−2.377.198.134.937
    S56.997.58−2.427.198.104.898
    S16.106.460.988.437.204.869
    S36.036.391.188.287.084.8210
    S126.296.480.057.588.374.7911
    S116.056.22−0.897.548.014.5012
    MT47.041.614.096.178.054.1513
    JS33.354.361.968.268.193.7014
    JS23.074.770.758.238.173.5615
    JS12.264.232.387.957.963.3616
    JS43.023.531.877.688.133.3217
    XJ13.962.481.028.227.573.2318
    MT36.500.620.925.497.463.2219
    XJ34.861.84−0.568.128.593.1920
    MT25.841.17−0.356.056.953.0221
    XJ44.122.10−0.908.128.472.9822
    DYT45.361.75−1.577.345.712.9123
    XJ24.141.48−1.638.218.472.7524
    MT15.760.56−3.157.236.892.5925
    DYT14.791.12−2.946.846.122.3826
    LJ22.111.64−0.778.037.242.2027
    DYT34.520.52−2.656.886.242.2028
    DYT25.230.37−4.186.107.512.1829
    LJ50.552.48−1.268.166.771.8830
    LJ30.891.84−1.478.137.161.8131
    LJ40.052.14−1.628.306.881.6232
    LJ10.301.71−2.087.676.931.4633
    下载: 导出CSV 
    | 显示表格

    主成分载荷反映了各变量对主成分的贡献大小和贡献方向,其绝对值越大,表明该变量对主成分的贡献越大,正负反映了方向[28]。利用SIMCA软件生成不同品牌酱香型白酒载荷图如图4所示,在主成分p[1]上,己酸、己酸乙酯、正己醇具有较高的正载荷,乙酸、苯乙酸乙酯具有较高的负载荷,说明p[1]是己酸、己酸乙酯、正己醇、乙酸、苯乙酸乙酯综合信息的反映。己酸乙酯呈水果味、苯乙酸乙酯具有花香二者具有较低的感知阈值和较强气味,己酸呈汗味、正己醇呈花香均具有较高的感知阈值[29];在主成分p[2]上,2-甲基丙醇、3-甲基丁醇具有较高的正载荷,2-羟基丙酸乙酯、十六烷酸乙酯、丁酸具有较高的负载荷,说明主成分p[2]反映的是2-羟基丙酸乙酯、十六烷酸乙酯、丁酸、2-甲基丙醇、3-甲基丁醇提供得到的信息。2-甲基丙醇呈麦芽香,具有较高的感知阈值。十六烷酸乙酯是高级脂肪酸酯,是白酒中的生物活性成分,类似黄油味[30]。同理主成分p[3]反映的是乙酸丙酯、正丙醇、2-丁醇提供得到的信息,表现出较高的正载荷。主成分p[4]反映的是2-甲基丙酸乙酯、3-甲基丁酸乙酯提供得到的信息,表现出较高的正载荷。主成分p[5]反映的是丙酸乙酯,表现出较高的正载荷,2-丁醇、正丁醇表现出较高的负载荷,三者共同提供得到的信息。上述结果充分说明己酸、己酸乙酯、正己醇、乙酸、苯乙酸乙酯、2-羟基丙酸乙酯、十六烷酸乙酯、丁酸、3-甲基丁醇、2-甲基丙醇、乙酸丙酯、正丙醇、2-丁醇、2-甲基丙酸乙酯、3-甲基丁酸乙酯、丙酸乙酯、正丁醇17种物质是造成特定品牌酱香型白酒区别于与其他品牌酱香型白酒的重要物质,是特定品牌酱香型白酒品质独特性的内在体现。文献报道[31-32]己酸、己酸乙酯、正丁醇、正己醇、乙酸、丙酸乙酯、苯乙酸乙酯、2-甲基丙酸乙酯、3-甲基丁酸乙酯、十六烷酸乙酯、2-羟基丙酸乙酯11种物质为酱香典型体酒的重要香气物质。由此推测特定品牌酱香型白酒品质独特性不仅体现在重要香气物质种类上,更主要的可能体现在重要香气物质的量比关系上,有待后续进行更加深入的研究。

    图  4  主成分分析载荷图
    Figure  4.  Loading plot of PCA

    本文采用GC-MS结合“中药色谱指纹图谱相似度评价系统”建立了特定品牌酱香型白酒标准指纹图谱,共确定20种共有物质。中药指纹图谱相似度评价结果与共有物质HCA、PCA结果一致,都可以有效评价特定品牌酱香型白酒的批次稳定性及品质独特性,可将特定品牌酱香型白酒与其他品牌酱香型白酒明显区分。且能够与具有相同酒精度产自贵州当地的酱香型白酒明显区分。可见GC-MS指纹图谱可准确、有效的对特定品牌酱香型白酒品质独特性及批次稳定性进行评价。同时主成分分析找到了17种物质己酸、己酸乙酯、正己醇、乙酸、苯乙酸乙酯、2-羟基丙酸乙酯、十六烷酸乙酯、丁酸、3-甲基丁醇、2-甲基丙醇、乙酸丙酯、正丙醇、2-丁醇、2-甲基丙酸乙酯、3-甲基丁酸乙酯、丙酸乙酯、正丁醇是造成特定品牌酱香型白酒与其他品牌酱香型白酒挥发性成分差异的主要物质,也是特定品牌酱香型白酒品质独特性的内在体现,并且推测不仅是重要香气物质的种类,而且是这些重要香气物质的量比关系特征成就了特定品牌酱香型白酒独特品质,这仍有待后续进行更加深入的研究。本文为特定品牌酱香型白酒质量控制提供了一定的理论依据和技术支撑,为其他酱香型白酒的质量控制提供参考。

  • 图  1   特定品牌酱香型白酒GC-MS谱图及对照指纹谱

    Figure  1.   GC-MS chromatogram of Maotai-flavor Baijiu of specific brand and control fingerprint

    图  2   不同白酒的聚类分析树状图

    Figure  2.   Cluster analysis dendrogram of different Baijiu

    图  3   基于GC-MS的主成分分析

    Figure  3.   PCA based on GC-MS

    图  4   主成分分析载荷图

    Figure  4.   Loading plot of PCA

    表  1   GC-MS方法学考察

    Table  1   GC-MS methodology investigation

    编号保留时间(min)物质名称精密度稳定性重复性
    相对峰面积RSD(%)相对保留时间RSD(%)相对峰面积RSD(%)相对保留时间RSD(%)相对峰面积RSD(%)相对保留时间RSD(%)
    16.98丙酸乙酯a1.60130.10161.80070.13211.73280.1996
    27.122-甲基丙酸乙酯a1.19270.11802.00950.12091.74400.1497
    37.35乙酸丙酯a2.79180.07482.22460.08172.69250.0966
    48.612-丁醇a1.44990.06383.90360.05950.95380.0824
    59.07正丙醇a1.15170.04971.73570.05671.45460.0393
    69.502-甲基丁酸乙酯1.41490.04741.48880.05390.74440.0375
    710.073-甲基丁酸乙酯a0.72830.04480.95690.03051.29040.0354
    810.732-甲基丙醇a1.64550.00002.22160.01431.61660.0433
    911.97正丁醇a1.62690.03551.70150.03981.45560.0424
    1012.42戊酸乙酯a0.58630.00000.80650.02200.74950.0420
    1114.252-庚酮1.41870.03861.68130.01732.60860.0000
    1215.073-甲基丁醇a1.03280.00001.73550.01431.69340.0495
    1316.14己酸乙酯a0.63080.02781.22890.03111.55040.0220
    1416.67正戊醇0.63190.03301.72420.01271.31260.0213
    1520.212-羟基丙酸乙酯a0.77340.02722.81890.01431.13500.0265
    1620.31正己醇a0.53150.00001.16830.00781.05760.0256
    1722.132-羟基丁酸乙酯1.93040.02481.75320.02301.72350.0160
    1822.2三甲基吡嗪5.06420.00004.63520.02244.30430.0159
    1922.92辛酸乙酯0.35590.00001.82600.02111.65760.0203
    2023.62乙酸a1.35390.00001.67950.00483.61020.0150
    2124.26糠醛a0.68000.00001.49000.01431.08000.0214
    2225.40乙酰呋喃3.61940.00003.57380.02052.94300.0140
    2325.97苯甲醛0.80880.00001.75220.00300.88750.0179
    2428.33丁酸a1.10940.00000.57920.00161.02540.0000
    2529.55丁二酸二乙酯0.94540.00000.82550.01801.04350.0157
    2630.58(2,2-二乙氧基乙基)-苯2.77360.01790.84050.00043.07690.0000
    2730.98戊酸0.79960.00000.89700.01761.30990.0000
    2832.32苯乙酸乙酯a1.31210.00001.58340.00041.30710.0000
    2933.40己酸a0.90110.01341.18810.01701.34780.0160
    3034.53苯丙酸乙酯2.73030.01591.58260.00132.51150.0000
    3135.13苯乙醇a1.15850.00001.57120.01630.94760.0101
    3241.44棕榈酸乙酯a5.17050.01115.61470.01078.56983.5145
    注:a代表特征成分,表2同。
    下载: 导出CSV

    表  2   特定品牌酱香型白酒 GC-MS 共有成分的总峰面积占比

    Table  2   Ratio of total peak area of common substances of Maotai-flavor Baijiu of specific brand based on GC-MS

    编号保留时间
    (min)
    物质名称总峰面积占比(%)
    S1S2S3S4S5S6S7S8S9S10S11S12
    16.98丙酸乙酯a3.950±0.01414.495±0.03543.895±0.00713.220±0.01412.595±0.02122.735±0.00712.800±0.04242.660±0.02832.505±0.00712.220±0.01412.335±0.00712.345±0.0071
    27.122-甲基丙酸乙酯a1.395±0.00711.355±0.00711.375±0.00711.335±0.00711.015±0.00711.095±0.00711.000±0.01411.115±0.03541.210±0.00001.040±0.01411.050±0.00001.045±0.0071
    37.35乙酸丙酯a1.010±0.00000.9300±0.00001.000±0.00000.4300±0.0000.6800±0.00000.7900±0.00001.375±0.00711.375±0.02120.4750±0.00710.6350±0.00710.6100±0.00000.6350±0.0354
    48.612-丁醇a1.025±0.00710.8800±0.00001.020±0.00000.6350±0.00710.9100±0.01410.9050±0.00711.000±0.00000.9300±0.01410.6600±0.00001.305±0.00711.245±0.02121.235±0.0071
    59.07正丙醇a15.02±0.176814.58±0.035415.06±0.106114.56±0.367712.20±0.042412.70±0.056615.33±0.091914.22±0.21929.960±0.000014.37±0.035411.97±0.042413.825±0.0636
    69.502-甲基丁酸乙酯0.3500±0.00000.3600±0.00000.3450±0.00710.3300±0.00000.2600±0.0000.2650±0.00710.2500±0.00000.2350±0.00710.2750±0.00710.3150±0.00710.2850±0.00710.2750±0.0071
    710.073-甲基丁酸乙酯a0.9650±0.00711.005±0.00710.9400±0.0000.9750±0.00710.7650±0.00710.7800±0.00000.700±0.00000.6900±0.01410.8700±0.00000.9400±0.01410.8400±0.00000.8350±0.0071
    810.732-甲基丙醇a2.935±0.02122.865±0.00712.925±0.00713.140±0.01413.000±0.04243.035±0.00712.980±0.01412.760±0.04242.835±0.00713.010±0.02832.940±0.00002.905±0.0495
    911.97正丁醇a1.480±0.01411.425±0.00711.465±0.00711.890±0.01412.520±0.02832.525±0.00712.335±0.00712.190±0.02832.095±0.00711.875±0.00712.240±0.00002.385±0.2051
    1012.42戊酸乙酯a1.415±0.00711.350±0.00001.380±0.00001.150±0.00001.035±0.00711.000±0.00000.9750±0.00710.9750±0.00711.055±0.00710.9950±0.00711.025±0.00711.030±0.0141
    1114.252-庚酮0.0300±0.00000.0300±0.00000.0300±0.00000.0200±0.00000.0200±0.00000.0200±0.00000.0200±0.00000.0200±0.00000.0250±0.00710.0300±0.00000.0500±0.00000.0500±0.0000
    1215.073-甲基丁醇a16.23±0.007115.41±0.000015.92±0.021215.68±0.021214.47±0.014114.16±0.049514.09±0.028313.06±0.141414.30±0.042415.35±0.007115.58±0.09915.16±0.502
    1316.14己酸乙酯a4.410±0.04244.020±0.02834.322±0.04244.195±0.00714.485±0.00714.270±0.02834.050±0.02834.130±0.01414.240±0.00003.535±0.02123.985±0.03543.650±0.4384
    1416.67正戊醇0.3650±0.00710.3550±0.00710.3552±0.00710.3650±0.00710.3800±0.00000.3600±0.00000.3700±0.00000.3450±0.00710.365±0.00710.3250±0.00710.3650±0.00710.3550±0.0212
    1520.212-羟基丙酸乙酯a16.88±0.106117.25±0.049516.52±0.000018.54±0.028318.85±0.035419.13±0.070718.41±0.063616.66±0.091917.50±0.127318.84±0.035418.34±0.077819.04±0.9192
    1620.31正己醇a1.070±0.00001.060±0.00001.020±0.00001.215±0.00711.410±0.01411.350±0.01411.310±0.00001.235±0.02121.285±0.00711.065±0.00711.190±0.00001.100±0.1273
    1722.132-羟基丁酸乙酯0.0300±0.00000.0200±0.00000.0300±0.00000.0250±0.00710.0200±0.00000.0200±0.00000.0200±0.00000.0200±0.00000.0200±0.00000.0300±0.00000.0200±0.00000.0215±0.0021
    1822.2三甲基吡嗪0.1850±0.00710.1550±0.00710.1800±0.00000.1450±0.00710.1200±0.01410.1000±0.00000.1000±0.00000.0900±0.00000.1250±0.00710.1350±0.00710.1400±0.00000.1300±0.0141
    1922.92辛酸乙酯0.2250±0.00710.2400±0.00000.2250±0.00710.2000±0.00000.1800±0.00000.1700±0.00000.1600±0.00000.1750±0.00710.2300±0.00000.2550±0.00710.3300±0.00000.3350±0.0071
    2023.62乙酸a1.255±0.04951.265±0.00711.290±0.04241.355±0.00711.245±0.03541.395±0.00711.335±0.00711.260±0.00001.310±0.01411.220±0.02831.490±0.01411.580±0.1131
    2124.26糠醛a10.59±0.014110.74±0.000010.19±0.035413.18±0.127314.10±0.077814.29±0.056612.51±0.084911.75±0.169711.24±0.08499.810±0.02839.365±0.04959.035±0.5162
    2225.40乙酰基呋喃0.1300±0.00000.1200±0.00000.1200±0.00000.1350±0.00710.1400±0.00000.1450±0.00710.1400±0.0000.1300±0.00000.1300±0.00000.1300±0.00000.1300±0.00000.1250±0.0071
    2325.97苯甲醛0.4750±0.00710.4850±0.00710.4600±0.00000.4800±0.00000.5100±0.00000.500±0.00000.4400±0.00000.4150±0.00710.4700±0.00000.4150±0.00710.4050±0.00710.4000±0.0141
    2428.33丁酸a1.150±0.01411.115±0.00711.130±0.00001.115±0.00711.085±0.00711.070±0.00001.030±0.00000.9500±0.01411.055±0.00711.050±0.00001.190±0.01411.270±0.0990
    2529.55丁二酸二乙酯0.3900±0.00000.3500±0.00000.3750±0.00710.3600±0.00000.2800±0.00000.2700±0.00000.2600±0.00000.2300±0.00000.2700±0.00000.2600±0.00000.2300±0.00000.2250±0.0071
    2630.58(2,2-二乙氧 基乙基)-苯0.0500±0.00000.0300±0.00000.0500±0.00000.0700±0.00000.0750±0.00710.0800±0.00000.0950±0.00710.1200±0.00000.0850±0.00710.0600±0.00000.0800±0.00000.0750±0.0071
    2730.98戊酸0.4200±0.00000.3900±0.00000.4100±0.00000.3400±0.00000.3200±0.00000.295±0.00710.3000±0.00000.2750±0.00710.3100±0.0000.2900±0.00000.3400±0.00000.3500±0.0141
    2832.32苯乙酸乙酯a0.5900±0.01410.5400±0.00000.5750±0.00710.5450±0.00710.4650±0.00710.4400±0.00000.4050±0.00710.3850±0.00710.4450±0.00710.4500±0.00000.3950±0.00710.3850±0.0071
    2933.40己酸a2.030±0.00001.805±0.00711.955±0.00711.920±0.00002.080±0.01411.925±0.00711.850±0.01411.770±0.02831.850±0.00001.480±0.00001.895±0.00711.805±0.1344
    3034.53苯丙酸乙酯0.0600±0.00000.0550±0.00710.0550±0.00710.05±0.00000.0400±0.00000.0400±0.00000.0400±0.00000.0400±0.00000.0400±0.00000.0500±0.00000.0300±0.00000.0300±0.0000
    3135.13苯乙醇a1.560±0.00001.520±0.00001.500±0.00001.495±0.00711.355±0.00711.300±0.00001.250±0.00001.155±0.02121.390±0.01411.380±0.01411.790±0.00001.720±0.0990
    3241.44十六烷酸乙酯a0.8250±0.02121.040±0.00000.8750±0.00711.025±0.00710.8400±0.01410.7650±0.00710.9150±0.00710.9100±0.01410.9700±0.01410.9550±0.00710.9050±0.02120.9400±0.0141
    下载: 导出CSV

    表  3   基于特定品牌酱香型白酒GC-MS 指纹图谱相似度计算结果

    Table  3   Similarity results based on GC-MS fingerprint of Maotai-flavor Baijiu of specific brand

    样品编号相似度样品编号相似度样品编号相似度
    S10.997S120.997LJ20.964
    S20.997LJ40.922LJ30.943
    S30.997DYT10.951LJ50.934
    S40.996DYT20.947MT10.946
    S50.998DYT30.956MT20.933
    S60.998DYT40.954MT30.901
    S70.998JS10.926MT40.907
    S80.998JS20.938XJ10.975
    S90.998JS30.952XJ20.971
    S100.998JS40.937XJ30.973
    S110.998LJ10.928XJ40.975
    下载: 导出CSV

    表  4   相似度方差分析

    Table  4   Variance analysis of similarity

    品牌相似度
    S0.9975a
    XJ0.9735b
    DYT0.952c
    JS0.93825c
    LJ0.9382c
    MT0.92175d
    注:同列不同小写字母表示差异显著(P<0.05)。
    下载: 导出CSV

    表  5   特定品牌酱香型白酒 GC-MS 特征成分的相对含量

    Table  5   Relative content of characteristic substances of Maotai-flavor Baijiu of specific brand based on GC-MS

    编号保留时间
    (min)
    物质名称相对含量(g/L)
    S1S2S3S4S5S6S7S8S9S10S11S12
    16.98丙酸乙酯0.0576±0.00070.0644±0.00070.0582±0.00060.0464±0.00010.0407±0.00010.0428±0.00010.0457±0.00080.0454±0.00050.0393±0.00070.3862±0.00130.0391±0.00020.0352±0.0057
    27.122-甲基丙酸乙酯0.0203±0.00030.0194±0.00000.0206±0.00000.0193±0.00020.0159±0.00020.0171±0.00010.0164±0.00030.0183±0.00170.0186±0.0010.0177±0.00010.0175±0.00010.0152±0.0034
    37.35乙酸丙酯0.0147±0.00020.0133±0.00010.015±0.00020.0062±0.00010.0106±0.00010.0123±0.00010.0224±0.00020.0235±0.00040.0074±0.00020.0104±0.00020.0102±0.00000.0099±0.0003
    48.612-丁醇0.0149±0.00020.0126±0.00010.0153±0.00020.0091±0.00020.0143±0.00030.0141±0.00020.0163±0.00000.0162±0.00040.0105±0.00010.0217±0.00080.0209±0.00030.0202±0.0006
    59.07正丙醇0.2191±0.00440.2089±0.00110.2252±0.00390.1546±0.00140.1913±0.00190.1983±0.00090.2499±0.00110.2462±0.00420.1576±0.00010.2385±0.00840.2002±0.00010.202±0.0027
    610.073-甲基丁酸乙酯0.0141±0.00020.0144±0.00010.0141±0.00010.014±0.00010.012±0.00000.0122±0.00000.0114±0.00010.0117±0.00040.0135±0.00050.0156±0.00040.014±0.00010.0124±0.0023
    710.732-甲基丙醇0.0428±0.00070.041±0.00000.0438±0.00040.0452±0.00030.047±0.00090.0474±0.00010.0486±0.00020.0478±0.00080.045±0.00040.05±0.00210.0491±0.00010.0458±0.0047
    811.97正丁醇0.0216±0.00040.0204±0.00020.0219±0.00030.0272±0.00020.0396±0.00070.0394±0.00020.0381±0.00000.0378±0.00050.0334±0.00050.0312±0.00090.0374±0.00000.0375±0.0000
    912.42戊酸乙酯0.0206±0.00040.0193±0.00010.0207±0.00020.0166±0.00010.0163±0.00000.0156±0.00010.0159±0.00010.0164±0.00050.0163±0.00060.0165±0.00040.0172±0.00010.0254±0.0117
    1015.073-甲基丁醇0.2368±0.00210.2209±0.00060.238±0.00220.226±0.00070.2269±0.00130.2211±0.00080.2297±0.00090.2259±0.00320.2281±0.0030.2547±0.00830.2605±0.00080.2395±0.0289
    1116.14己酸乙酯0.0643±0.00120.0576±0.00050.0646±0.00010.0605±0.00000.0704±0.00030.0667±0.00040.066±0.00070.0694±0.00280.0654±0.0030.0586±0.00150.0666±0.00030.0579±0.012
    1220.212-羟基丙酸乙酯0.2462±0.00360.2472±0.00150.2471±0.00260.2673±0.00000.2955±0.00150.2988±0.00090.3001±0.00040.2897±0.00660.282±0.0090.3126±0.00950.3065±0.00230.2997±0.0119
    1320.31正己醇0.0156±0.00020.0152±0.00000.0153±0.00020.0175±0.00010.0221±0.00000.0211±0.00020.0214±0.00000.0212±0.00020.0203±0.00010.0177±0.00040.02±0.00010.0175±0.0036
    1423.62乙酸0.0183±0.00090.0182±0.00020.0193±0.00080.0195±0.00010.0196±0.00040.0217±0.00010.0218±0.00010.0217±0.00000.0206±0.00030.0203±0.00110.0249±0.00030.0248±0.0004
    1524.26糠醛0.1545±0.00140.154±0.00040.1523±0.00110.19±0.00150.221±0.00020.2232±0.00080.204±0.00170.2022±0.00190.1787±0.00170.1628±0.00470.1566±0.00130.1429±0.0206
    1628.33丁酸0.0168±0.00040.016±0.00010.0169±0.00020.0161±0.00010.017±0.00010.0167±0.00000.0168±0.00000.0164±0.00010.0167±0.00010.0174±0.00060.0199±0.00040.0209±0.0012
    1732.32苯乙酸乙酯0.0086±0.00020.0077±0.00000.0086±0.00000.0079±0.00010.0073±0.00010.0069±0.00000.0067±0.00010.0066±0.00010.0069±0.00020.0075±0.00030.0066±0.00000.0061±0.0007
    1833.40己酸0.0296±0.00030.0259±0.00020.0292±0.00040.0277±0.00000.0326±0.00000.0301±0.00000.0302±0.00010.0303±0.00030.0292±0.00010.0246±0.00070.0317±0.00020.0286±0.0045
    1935.13苯乙醇0.0227±0.00020.0218±0.00010.0224±0.00020.0215±0.00010.0212±0.00020.0203±0.00010.0203±0.00000.0199±0.00020.0221±0.00020.0229±0.00050.0299±0.00000.0255±0.0062
    2041.44十六烷酸乙酯0.012±0.00040.0149±0.00010.0131±0.00010.0148±0.00010.0131±0.00030.0119±0.00010.0149±0.00000.005±0.00840.0049±0.00790.0006±0.00000.0579±0.00060.0517±0.0093
    下载: 导出CSV

    表  6   主成分总方差解释

    Table  6   Principal component total variance explained

    主成分方差贡献率方差累计贡献率特征值
    10.300.305.95
    20.250.555.07
    30.140.692.80
    40.100.791.96
    50.070.861.35
    下载: 导出CSV

    表  7   主成分得分系数矩阵

    Table  7   Principal component score coefficient matrix

    特征物质主成分1主成分2主成分3主成分4主成分5
    丙酸乙酯−0.150.190.450.42−0.52
    2-甲基丙酸乙酯0.62−0.120.150.72−0.16
    乙酸丙酯0.480.080.76−0.200.12
    2-丁醇−0.16−0.120.80−0.140.44
    正丙醇0.300.410.790.070.20
    3-甲基丁酸乙酯0.16−0.530.030.720.09
    2-甲基丙醇0.29−0.73−0.360.190.29
    戊酸乙酯−0.620.580.040.38−0.16
    正丁醇0.430.55−0.390.060.54
    3-甲基丁醇−0.23−0.85−0.180.160.09
    己酸乙酯−0.880.31−0.070.260.10
    2-羟基丙酸乙酯0.520.75−0.200.050.11
    正己醇−0.860.12−0.180.230.31
    乙酸0.860.170.020.300.13
    糠醛0.590.30−0.50−0.070.06
    丁酸0.210.78−0.190.260.05
    苯乙酸乙酯0.76−0.26−0.16−0.09−0.36
    己酸−0.870.38−0.050.210.11
    苯乙醇0.25−0.600.180.330.31
    十六烷酸乙酯0.390.840.000.12−0.01
    下载: 导出CSV

    表  8   主成分得分、综合得分及排名

    Table  8   Principal component scores, comprehensive scores and rankings

    编号主成分1主成分2主成分3主成分4主成分5综合得分排名
    S97.337.930.117.148.315.421
    S47.207.33−1.098.067.725.122
    S77.387.78−2.087.198.145.103
    S87.397.72−2.147.148.125.084
    S106.736.620.627.587.634.985
    S26.366.760.838.346.674.946
    S67.037.63−2.377.198.134.937
    S56.997.58−2.427.198.104.898
    S16.106.460.988.437.204.869
    S36.036.391.188.287.084.8210
    S126.296.480.057.588.374.7911
    S116.056.22−0.897.548.014.5012
    MT47.041.614.096.178.054.1513
    JS33.354.361.968.268.193.7014
    JS23.074.770.758.238.173.5615
    JS12.264.232.387.957.963.3616
    JS43.023.531.877.688.133.3217
    XJ13.962.481.028.227.573.2318
    MT36.500.620.925.497.463.2219
    XJ34.861.84−0.568.128.593.1920
    MT25.841.17−0.356.056.953.0221
    XJ44.122.10−0.908.128.472.9822
    DYT45.361.75−1.577.345.712.9123
    XJ24.141.48−1.638.218.472.7524
    MT15.760.56−3.157.236.892.5925
    DYT14.791.12−2.946.846.122.3826
    LJ22.111.64−0.778.037.242.2027
    DYT34.520.52−2.656.886.242.2028
    DYT25.230.37−4.186.107.512.1829
    LJ50.552.48−1.268.166.771.8830
    LJ30.891.84−1.478.137.161.8131
    LJ40.052.14−1.628.306.881.6232
    LJ10.301.71−2.087.676.931.4633
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-04-13
  • 网络出版日期:  2023-03-04
  • 刊出日期:  2023-04-30

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