碘量法测定液体石油产品中硫化氢含量

通过酸化-吹气-吸收装置来提取液体石油产品中的硫化氢，在酸性条件下，硫化物与过量的碘作用，剩余的碘用硫代硫酸钠滴定，由硫代硫酸钠溶液所消耗的量，间接求出硫化氢的含量。经过一系列实验发现：该分析方法加标回收率在94．48％-97．36％，标准偏差0．0159，变异系数2．05％，分析结果表明数据的准确度和精密度较好，取得了满意的效果。

Determination of sulfureted hydrogen in liquid petroleum by iodometric method

The sulfureted hydrogen was extracted from the petroleum products by means of Acidification-Nitrogen blowing -Absorption Unit. In acidic condition,the sulfured reacted with excessive iodine. The surplus iodine was titrated with sodium thiosulfate. Based on the amount of sodium thiosulfate consumed,the sulfureted hydrogen content was calculated indirectly. After a series of experiments,it was found that the recovery was 94.48~97.36%,the standard deviation was 0.015 9 and coefficient of variation was 2.05% us...