作者：孙鹏1,2, 于立娟2, 李广义2, 马西忠2, 呂会霞2
作者单位：1. 山东省海洋精细化工重点实验室, 山东 潍坊 262737;
2. 山东省海洋化工科学研究院, 山东 潍坊 262737
关键词：氢化物发生; 原子荧光法; 食盐; 砷; 汞
摘要：
建立一种氢化物发生-原子荧光光谱法同时测定食盐中砷和汞的方法。研究样品前处理对测定结果的影响,探索同时测定砷、汞的最佳实验条件。优化条件下,砷、汞质量浓度分别在0~10.0g/L和0~2.0g/L范围内,线性关系良好。方法检出限:As为0.004 3g/L,Hg为0.003 2g/L;相对标准偏差:As为0.37%,Hg为0.61%;样品加标回收率:As为97.80%~102.40%,Hg为96.78%~100.80%。试验表明:该方法具有操作简便、快速、准确度高等优点,可用于食盐中砷汞的同时测定。
Simultaneous determination of As and Hg in salt by hydride generation atomic fluorescence spectrometry
SUN Peng1,2, YU Lijuan2, LI Guangyi2, MA Xizhong2, LÜ Huixia2
1. Shandong Provincial key Laboratory of Ocean Fine Chemical, Weifang 262737, China;
2. Shandong Ocean Chemical Industry Scientific Research Institute, Weifang 262737, China
Abstract: Simultaneous determination of As and Hg in salt by hydride generation atomic fluorescence spectrometry was developed. The authors studied the effects of different sample pretreatment methods on the determination results and explored the optimal experimental conditions for simultaneous determination of As and Hg. Under the optimized condition,linearity range for the determination of As was found to be 0~10.0 μg/L, and Hg to be 0~2.0 μg/L. The detection limits of the method for As and Hg were 0.004 3 μg/L and 0.003 2 μg/L, respectively. The relative standard deviation was found to be 0.37% of As and 0.61% of Hg. The recovery rate of the method varies from 97.80% to 102.40% for As and from 96.78% to 100.80% for Hg. Experimental results show this method is simple, rapid and sensitivity, and can be applied to the simultaneous determination of As and Hg in salt with satisfactory results.
Keywords: hydride generation; atomic fluorescence spectrometry; salt; As; Hg
2015, 41(1): 46-49,53 收稿日期: 2014-2-27;收到修改稿日期: 2014-4-29
基金项目:
作者简介: 孙鹏(1985-),男,山东济宁市人,工程师,主要从事海洋化工科学研究及盐产品质量检测工作。
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