电感耦合等离子体质谱(ICP-MS)测定畜禽肉中9种重金属元素含量

Determination of Nine Heavy Metal Elements in Livestock and Poultry Meat by ICP-MS

目的:建立石墨消解-电感耦合等离子体质谱法测定畜禽肉中9种重金属元素,并对7种畜禽肉样品中重金属含量进行分析。方法:采用石墨消解法进行样品前处理,用电感耦合等离子质谱法(ICP-MS)检测重金属含量,并计算各元素含量。结果:铬、铅、砷、镉、钴在0~50μg/L,铜、锰、镍在0~500μg/L,锌在0~1000μg/L浓度范围内线性关系良好(r≥0.9999),检出限在0.003~0.400μg/L之间。样品加样回收率在97.2%~104.4%,RSD≤5.0%(n=6)。对国家标准物质(GSB-27、 GSB-28)的测定结果均在标准值标准偏差范围内。结论:该方法准确度和精密度高,线性范围广,适用于畜禽肉的检测。本研究为广州市畜禽类的安全性评价,监管体系的建立及运行提供科学依据。

Objective:Inductively coupled plasma mass spectrometry(ICP-MS)was established for the determination of nine heavy metal elements in livestock and poultry meat,and was applied to the analysis of heavy metal content in seven kinds of livestock and poultry meat samples.Methods:The samples were pretreated with graphite digestion,and heavy metals were detected by ICP-MS.Results:Chromium,lead,arsenic,cadmium,and cobalt(0~50μg/L),copper,manganese and nickel(0~500μg/L),and zinc(0~1000μg/L)showed a good linear relationship(r≥0.9999).The limits of detection were ranged from 0.003 to 0.400μg/L,the recoveries ranged from 97.2%to 104.4%,RSD≤5.0%(n=6).The results of National Standard Substance(GSB-27,GSB-28)were all within the standard deviation of the standard value.Conclusion:The proposed method had a wide linear range,high accuracy and precision,which was suitable for the monitoring of livestock and poultry meat.This study provided a scientific basis for the safety evaluation,establishment and operation of the supervision system of livestock and poultry in Guangzhou.