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中国精品科技期刊2020
金平, 陈建伟. 不同产地桃胶无机元素的ICP-MS分析与评价[J]. 食品工业科技, 2019, 40(21): 219-224. DOI: 10.13386/j.issn1002-0306.2019.21.036
引用本文: 金平, 陈建伟. 不同产地桃胶无机元素的ICP-MS分析与评价[J]. 食品工业科技, 2019, 40(21): 219-224. DOI: 10.13386/j.issn1002-0306.2019.21.036
JIN Ping, CHEN Jian-wei. Analysis and Evaluation of Inorganic Elements in Peach Gum from Different Areas by ICP-MS[J]. Science and Technology of Food Industry, 2019, 40(21): 219-224. DOI: 10.13386/j.issn1002-0306.2019.21.036
Citation: JIN Ping, CHEN Jian-wei. Analysis and Evaluation of Inorganic Elements in Peach Gum from Different Areas by ICP-MS[J]. Science and Technology of Food Industry, 2019, 40(21): 219-224. DOI: 10.13386/j.issn1002-0306.2019.21.036

不同产地桃胶无机元素的ICP-MS分析与评价

Analysis and Evaluation of Inorganic Elements in Peach Gum from Different Areas by ICP-MS

  • 摘要: 目的:建立电感耦合等离子质谱(ICP-MS)测定桃胶中20种无机元素的方法,并进行主成分分析,比较不同产地间桃胶无机元素的差异。方法:采用湿法消解,ICP-MS测定10个产地桃胶的20种无机元素含量,并对其进行主成分分析及评价。结果:方法学考察表明,精密度、重复性、稳定性的RSD值分别为0.4%~2.6%、0.4%~6.2%、0.5%~3.6%,样品在3 h内稳定性良好。各元素回收率在88.7%~107.8%之间,RSD为0.9%~3.7%,表明方法具有可靠性;10个产地桃胶的无机元素种类基本相似,K含量最高,其次为Mg,而K、P、Sr、Ba四种元素产地差异较大,10个产地重金属元素含量均低于限定标准。相关性分析表明,28对元素有相关性,其中4对元素呈极显著正相关(P<0.01),24对元素呈显著正相关(P<0.05)。经主成分分析,前4个主成分因子累积方差贡献率为85.757%,可作为综合评价标准,V、Li、Ge、Sr、P、Mg、Fe、Mn、Co、K为桃胶的特征元素,最终得出福建屏南、浙江苍南、江苏无锡三个产地桃胶的综合得分较高。结论:电感耦合等离子质谱(ICP-MS)法分析速度快、灵敏度高,可用于桃胶中无机元素的含量测定,并为桃胶的质量控制与安全评价提供了参考依据。

     

    Abstract: Objective:To establish an inductively coupled plasma mass spectrometry(ICP-MS)method for the determination of 20 inorganic elements in peach gum,and to compare the differences of inorganic elements in peach gum between different producing areas by principal component analysis. Methods:The contents of 20 inorganic elements in peach gum from 10 producing areas were determined by ICP-MS with wet digestion,and the principal component analysis and evaluation were carried out. Results:The RSD values of precision,repeatability and stability were 0.4%~2.6%,0.4%~6.2% and 0.5%~3.6% respectively. The samples were stable within 3 h.The recovery of each element was 88.7%~107.8%,RSD was 0.9%~3.7%,which indicated that the method was reliable. The inorganic elements in peach gum from 10 producing areas were similar,K content was the highest,followed by Mg,while K,P,Sr and Ba had great differences. Heavy metal elements in 10 producing areas were lower than the limit. The correlation analysis showed that 28 pairs of elements were correlated,of which 4 pairs were extremely significantly positively correlated(P<0.01),and 24 pairs were significantly positively correlated(P<0.05). By principal component analysis,the cumulative variance contribution rate of the first four principal component factors was 85.757%,which could be used as a comprehensive evaluation standard. V,Li,Ge,Sr,P,Mg,Fe,Mn,Co and K were the characteristic elements of peach gum. Finally,it was concluded that the comprehensive scores of peach gum from Pingnan,Cangnan,Fujian and Wuxi in Jiangsu were high. Conclusion:Inductively coupled plasma mass spectrometry(ICP-MS)is a rapid and sensitive method for the determination of inorganic elements in peach gum,which can provide reference for the quality control and safety evaluation of peach gum.

     

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