无汞锌粉中氧化锌的测定

Determination for zinc oxide in mercury-free zinc powder

使用碘试剂来分离提取无汞锌粉中的氧化锌,采用原子吸收分光光度法对提取液中的锌元素进行测定。并分别比较了氯化铵 氢氧化铵、乙酸铵、碘3种介质溶解提取氧化锌的试验。试验结果表明:碘试剂提取法较好,测定结果较为符合实际情况。此法回收率为92.31%～104.5%之间,相对标准偏差为5.5%。

Zinc oxide in mercuryfree zinc powder was separated by extraction using iodine in solution,then determined the zinc content in the filtrate by atomic absorption spectrometry.Three kinds of extration solutions i.e. ammonium chlorideammonium hydroxide,ammonium acetate,and iodine solution were tested separately.The results showed that the solution containing iodine was better than the others.Its recovery rate was 92.31%～104.5%,the relative standard deviation was 5.5%.