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中国精品科技期刊2020
魏军晓, 李丽兵, 宋薇. 北京市部分超市销售食品的铅含量分析[J]. 食品工业科技, 2018, 39(7): 216-221. DOI: 10.13386/j.issn1002-0306.2018.07.039
引用本文: 魏军晓, 李丽兵, 宋薇. 北京市部分超市销售食品的铅含量分析[J]. 食品工业科技, 2018, 39(7): 216-221. DOI: 10.13386/j.issn1002-0306.2018.07.039
WEI Jun-xiao, LI Li-bing, SONG Wei. Analysis of lead concentrations of foods in some supermarkets in Beijing[J]. Science and Technology of Food Industry, 2018, 39(7): 216-221. DOI: 10.13386/j.issn1002-0306.2018.07.039
Citation: WEI Jun-xiao, LI Li-bing, SONG Wei. Analysis of lead concentrations of foods in some supermarkets in Beijing[J]. Science and Technology of Food Industry, 2018, 39(7): 216-221. DOI: 10.13386/j.issn1002-0306.2018.07.039

北京市部分超市销售食品的铅含量分析

Analysis of lead concentrations of foods in some supermarkets in Beijing

  • 摘要: 目的:研究北京市部分超市销售食品的铅含量,为北京市食品安全评估提供参考依据。方法:采集北京市近40家超市销售的28类(总计496件)样品,采用石墨炉原子吸收光谱法(GF-AAS)对样品铅含量进行测定,方法检出限为0.005 mg·kg-1,在质量浓度0~20 μg·L-1范围内线性相关系数介于0.9989~0.9995。结果:28类样品铅含量平均值为0.0957 mg·kg-1,95%置信区间为0.0191~0.2104 mg·kg-1。结论:组间聚类分析表明,香辛料和液态调味料(Ⅰ类,含量范围为0~2.8944 mg·kg-1)、半固态调味品和方便面食(Ⅱ类,含量范围为0~0.3328 mg·kg-1)、小麦粉、白酒和蔬菜等24类样品(Ⅲ类,含量范围为0~0.0983 mg·kg-1)铅含量依次降低。

     

    Abstract: Objective:To analyze concentrations of lead in foods sold in some supermarkets in Beijing and to provide reference for local food safety assessment. Methods:496 food samples of 28 types were collected from nearly 40 supermarkets. Concentrations of lead was determined by using graphite furnace atomic absorption spectrometry(GF-AAS),the detection limit was 0.005 mg·kg-1,and linear correlation coefficient was between 0.9989~0.9995 when mass concentration stay within 0~20 μg·L-1. Results:The average concentration of lead of those samples was 0.0957 mg·kg-1,and 95% confidence interval was 0.0191~0.2104 mg·kg-1. Conclusion:Hierarchical cluster analysis showed that concentrations of lead decreased in the following order:spices and liquid seasoning(class Ⅰ),semisolid condiments and instant noodles(class Ⅱ),and other 24 kinds of samples including wheat flour,white wine and vegetables(class Ⅲ). Lead concentrations of the above three classes were 0~2.8944,0~0.3328,0~0.0983 mg·kg-1,respectively.

     

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