(1.中国检验检疫科学研究院食品安全研究所,北京 100176;2.北京安科慧生科技有限公司,北京 101102)
刘通 男 副研究员 研究方向为食品安全 E-mail:liutongyes@163.com
国家重点研发计划 (2018YFC1603700；2018YFC1603606)
(1.Institute of Food Safety, Chinese Academy of Inspection and Quarantine, Beijing 100176, China;2.Beijing Ancoren Technology Co.LTD, Beijing 101102, China)
目的 建立一种基于X射线荧光光谱仪(X-Ray Fluorescence Spectrometry, XRF)结合快速基本参数法快速测定不同食品样品中砷、铅、镉元素的分析方法。方法 样品粉碎过筛后,压片制备,用XRF结合基本参数法进行定量分析和快速筛查分析。结果 XRF方法的As、Cd、Pb检出限分别为:0.07、0.06、0.07 mg/kg。在国标GB 2762—2017规定的食品限量浓度水平,As、Cd、Pb的XRF检测结果和电感耦合等离子体质谱法检测结果相比相对相差值均小于25%。针对谷物、豆类、肉制品、水产品样品的XRF快速检测,除个别食品类别外,As、Cd和Pb元素的假阳性率和假阴性率均小于5%。结论 该方法具有操作简单、检测快速、灵敏度高等特点,适用于食品中砷、镉和铅的现场、快速筛查分析。
Objective To establish a rapid determination method for As, Cd and Pb in food by X-ray fluorescence spectrometry combined with fundamental parameter method. Methods The food samples were crushed and screened, and then the test samples were prepared and the quantitative analysis and rapid screening analysis were performed by XRF combined with fundamental parameter method. Results The experimental result showed that the detection limits (mg/kg) of As, Cd and Pb of XRF were 0.07,0.06, and 0.07, respectively. At the limit of quantitation level of GB 2762—2017 for food, the relative difference of XRF detection result of As, Cd and Pb were less than 25% compared with ICPMS. For the rapid detection of cereals, beans, meat products and aquatic products samples, XRF result showed that, the false positive rate and false negative rate of As, Cd and Pb were less than 5%, except for a few food types. Conclusion The method was suitable for screening analysis of arsenic, lead and cadmium in different food samples with the advantage of simple, rapid and highly sensitive.
刘通,邢仕歌,刘晓静,王秀娟,滕飞,刘小东,许秀丽. X射线荧光光谱结合基本参数法快速测定食品中砷、镉、铅元素含量[J].中国食品卫生杂志,2021,33(6):790-796.
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