原子荧光法测定食品添加剂硫酸铜中痕量砷  

Determination of Trace Arsenic in Food Grade Copper Sulfate by Atomic Fluorescence Spectrometry

作　　者：李梅 伍伟超 关智维 

机构地区：[1]广州市谱尼测试技术有限公司,广东广州510399

出　　处：《广东化工》2016年第14期233-234,共2页Guangdong Chemical Industry

摘　　要：原子荧光法测定食品添加剂硫酸铜中痕量砷,铜与硫脲和硼氢化钾反应均发生沉淀,影响测量结果。样品溶液先用碘化钾将溶液中的铜还原为碘化亚铜,然后加入硫氰酸盐,将溶液中游离的亚铜离子以硫氰化亚铜的形式沉淀下来,过滤定容后测定样品溶液中的砷,回算出样品中的砷含量。该方法条件下加标回收实验结果符合相关要求。In the determination of Trace Arsenic in food grade copper sulfate by atomic fluorescence spectrometry, the reaction of copper with thiourea and potassium. If the copper reduction of cuprous iodide, which using potassium thiocyanate complete precipitation, can effectively eliminate the interference of copper. With this method, the experimental results of recovery of spiked standard are in accordance with the relevant requirements.

关 键 词：原子荧光光度计 砷 硫酸铜 

分 类 号：O65[理学—分析化学]