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Determination of Total Arsenic in Laver by Inductively Coupled Plasma Mass Spectrometry
Author(s): 
Pages: 45-48
Year: Issue:  9
Journal: GUANGDONG TRACE ELEMENTS SCIENCE

Keyword:  紫菜电感耦合等离子体质谱法;
Abstract: 采用电感耦合等离子体质谱(ICP-MS)法,对紫菜中的微量元素砷进行了测定.用HNO3-H2O2混合体系分解样品,通过在线加入内标元素校正基体效应和接口效应,通过EPA 200.8干扰校正方程校正质量数干扰.校正曲线的相关系数大于0.999 9,As的检出限(3σ)为0.021 μg·L-1,样品分析结果的相对标准偏差3.7%(n=6),加标平均回收率为96.0%.通过测定贻贝标准物质GBW 08571验证了该方法的准确性.
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