摘要
对电感耦合等离子体-质谱和原子荧光光谱测定海产品中总砷的方法及结果进行了比较。HNO3-H2O2混合体系微波消解处理样品,总砷采用在线加内标、碰撞池模式、ICP-MS测定和加入预还原剂-氢化物发生原子荧光光谱测定,两种方法校准曲线的相关系数均大于0.9995,检出限分别为0.0023μg/L和0.029μg/L,加标回收率均在97.0%—106.7%之间,精密度分别为1.29%和2.00%,前后两种方法测定紫菜总砷的含量分别是9.41mg/kg和2.42mg/kg,测定鱼片中总砷的含量分别为1.48mg/kg和0.024mg/kg。针对几种不同砷化合物进行了微波消解后,两种测定方法的比较,试图分析并解释引起测定结果差距显著的原因。
A methodological comparison between inductively coupled plasma-mass spectrometry and atomic fluoresence spectrometry was occured for determination of total arsenic in sea products.The samples were digested by HNO3-H2O2.The internal standard added on line and octupole reaction system were used for ICP-MS,and adding before-reducing agent-hydride generation were for atomic fluorescence spectrum.The calibration curve coefficient results of two methods were greater than 0.9995,and the limits of detection were estimated to be 0.0023μg/L and 0.029μg/L.The standard recoveries for samples were in the range of 97.0%—106.7%.The precision of samples were 1.29% and 2.00%,respectively.The content of total arsenic in laver determined by inductively coupled plasma mass spectrometry and atomic fluorescence spectrum were 9.41mg/kg and 2.42mg/kg,respectively,and total arsenic in fish were 1.48mg/kg and 0.024mg/kg.Some different arsenic compounds after microwave digestion were determined by these two methods,and this could be applied to analyze and explain that why there was observably different results.
出处
《光谱实验室》
CAS
CSCD
北大核心
2011年第2期645-649,共5页
Chinese Journal of Spectroscopy Laboratory
关键词
总砷
海产品
原子荧光光谱
电感耦合等离子体-质谱
有机砷
Total Arsenic
Sea Products
Atomic Fluorescence Spectrum
Inductively Coupled Plasma-Mass Spectrometry
Organic Arsenic
