混酸体系-四级杆碰撞反应池-ICP/MS法测定含硅类食品添加剂中的铅和砷  

Determination of Lead and Arsenic in Silicon-containing Food Additives by a Mixed Acid System-quadrupole Collision Reaction Cell-ICP/MS Method

作　　者：高喜凤 董瑞 于文江 赵发 张寒霜 韩晓晓 刘艳明 GAO Xifeng;DONG Rui;YU Wenjiang;ZHAO Fa;ZHANG Hanshuang;HAN Xiaoxiao;LIU Yanming(Shandong Institute for Food and Drug Control,Key Laboratory of Supervising Technology for Meat and Meat Products for State Market Regulation,Shandong Research center of Engineering and Technology for Quality Control of Food for Special Medical,Jinan 250101,China)

机构地区：[1]山东省食品药品检验研究院,国家市场监管重点实验室(肉及肉制品监管技术),山东省特殊医学用途配方食品质量控制工程技术研究中心,山东济南250101

出　　处：《现代食品科技》2023年第5期312-317,共6页Modern Food Science and Technology

摘　　要：该文建立了一种混酸体系-四级杆碰撞反应池-ICP/MS法(Inductively Coupled Plasma Mass Spectrometry,ICP/MS)测定含硅类食品添加剂中铅、砷的方法。样品用氢氟酸-盐酸-硝酸组成的混酸体系进行微波消解前处理,采用四级杆碰撞反应池-ICP/MS法进行铅、砷的同时测定,选取Pb208、As75作为测定目标元素,Bi209、Ge72做相应的内标元素,应用碰撞/反应池技术、氦气动能歧视(Kinetic Energy Discrimination,KED)模式进行分析检测。铅、砷在0.0005~0.1000μg/mL范围内线性关系良好,r2均大于0.999。对样品进行加标回收验证,铅、砷的回收率分别为92.0%~107.0%和94.0%~104.0%,相对标准偏差(Relative Standard Deviations,RSDs)分别为2.49%、1.68%,铅、砷的检出限分别为0.003和0.002 mg/kg。该方法具有高的准确度、灵敏度、精密度和很小的干扰性等优点,适合测定含硅类食品添加剂中的铅、砷,可用来进行含硅类食品添加剂的质量监控和安全评价。A mixed acid system-quadrupole collision reaction cell-ICP/MS(Inductively Coupled Plasma Mass Spectrometry,ICP/MS)method for determination of lead and arsenic in silicion-containing food additives was set up.Samples were pretreated by microwave digestion with a mixed hydrofluoric acid-hydrochloric acid-nitric acid system,then the lead and arsenic were simultaneously determined by the quadruple collision cell-ICP/MS method,with Pb208 and As75 as the target elements for determination,Bi209 and Ge72 as the corresponding internal standard elements,and the collision/reaction cell technology and helium kinetic energy discrimination(KED)mode for analysis and detection.Lead and arsenic had a good linear relationship in the range of 0.0005~0.1000μg/mL with r2 greater than 0.999.The samples were subjected to standard addition recoveries experiments,and the spiked recoveries of lead and arsenic were 92.0%~107.0%and 94.0%~104.0%,respectively.The samples were spiked and recovered to verify that the recoveries of lead and arsenic were 2.49%and 1.68%,respectively.The detection limits of lead and arsenic were 0.003 mg/kg and 0.002 mg/kg,respectively.This method had advantages in terms of high accuracy,high sensitivity,high precision and little interference,which is suitable for the determination of lead and arsenic in silicon-containing food additives,as well as quality monitoring and safety evaluation of silicon-containing food additives.

关 键 词：混酸体系 含硅类食品添加剂 动能歧视模式 铅 砷 

分 类 号：TS202.3[轻工技术与工程—食品科学] O657.63[轻工技术与工程—食品科学与工程]