基于碰撞/反应池技术的电感耦合等离子体质谱法测定米粉中9种元素  

Determination of 9 elements in rice flour by inductively coupled plasma-mass spectrometry based on collision/reaction cell technology

作　　者：宋利军[1] 李腾根 廖秀海 周银古 SONG Li-jun;LI Teng-gen;LIAO Xiu-hai;ZHOU Yin-gu(Xinyu Center for Disease Control and Prevention,Xinyu,Jiangxi 338025,China)

机构地区：[1]新余市疾病预防控制中心,江西新余338025

出　　处：《中国卫生检验杂志》2019年第1期19-21,共3页Chinese Journal of Health Laboratory Technology

基　　金：江西省卫生计生委科技计划项目(20186027)

摘　　要：目的建立米粉中钛(Ti)、钒(V)、铬(Cr)、锰(Mn)、镍(Ni)、铜(Cu)、砷(As)、镉(Cd)和铅(Pb)的电感耦合等离子体质谱检测方法。方法米粉样品经微波消解后,采用电感耦合等离子体质谱法(ICP-MS)对9种元素进行测定。结果 9种元素的线性关系良好(r=0. 999),加标回收率为70. 3%～119. 5%,相对标准偏差(RSD)<10%。10份米粉样品中,9种元素均检出,米粉中Ti、V、Cr、Mn、Ni、Cu、As、Cd和Pb的含量分别为1. 24 mg/kg～1. 99 mg/kg、0. 004 2 mg/kg～0. 041 mg/kg、0. 92 mg/kg～1. 15 mg/kg、1. 049 mg/kg～4. 8 mg/kg、0. 32 mg/kg～0. 57 mg/kg、0. 48 mg/kg～2. 65 mg/kg、0. 009 mg/kg～0. 025 mg/kg、0. 044 mg/kg～0. 18 mg/kg和0. 039 mg/kg～0. 12 mg/kg,根据GB 2762—2017《食品安全国家标准食品中污染物限量》,有7份样品中的Cr超标,含量为1. 033 mg/kg～1. 15 mg/kg。结论本法灵敏、准确、快速,可用于米粉中9种元素的测定。Objective To establish an inductively coupled plasma-mass spectrometry(ICP-MS)method for detecting titanium (Ti ),vanadium (V),chromium (Cr),manganese (Mn ),nickel (Ni ),copper (Cu ),arsenic (As ),cadmium (Cd ),and lead(Pb)in rice flour.Methods The rice flour samples were digested by microwave,and the above 9elements in the rice flour were detected by ICP-MS.Results The matrix -matched calibration curve of 9elements showed good linearity (r = 0.999),and the recovery was within 70.3%-119.5%,and the relative standard deviation(RSD)was less than 10%.The 9 elements were detected in 10rice flour samples,and the contents range of Ti,V,Cr,Mn,Ni,Cu,As,Cd and Pb were within 1.24mg/kg -1.99mg/kg,0.0042mg/kg -0.041mg/kg,0,92mg/kg -1.15mg/kg,1.049mg/kg -4.8mg/kg, 0.32mg/kg-0.57mg/kg,0.48mg/kg -2.65mg/kg,0.009mg/kg -0.025mg/kg,0.044mg/kg -0.18mg/kg and 0.039mg/kg -0.12mg/kg,respectively.According to GB 2762--2017Food Safety National Standard Food Pollutant Limit, Cr was exceeded in 7rice flour samples,with the concentration of 1.033mg/kg -1.15mg/kg.Conclusion The method is sensitive,accurate and rapid,and can be used for the determination of 9 elements in rice flour.

关 键 词：碰撞/反应池技术 电感耦合等离子体质谱法 元素 米粉 

分 类 号：O657.63[理学—分析化学]