对于水中微量总硫化物的常规分析,一般以碘量法和亚甲基兰比色法为主。后者适用于进行20ppmS-以下水样的分析,操作简便,快速准确,缺点是鉴于硫化钠标准液的不稳定性,在每次测定前必须现配现标,这不仅增多了操作手续,且易引入误差。美国“水和废水标准检验法”一书采用以亚 For the routine analysis of trace amounts of total sulfide in water, iodometry and methylene blue colorimetric methods are generally used. The latter is suitable for the analysis of water samples below 20ppmS-, easy to operate, fast and accurate, the disadvantage is that in view of the instability of sodium sulfide standard, before each determination must be with the current standard, which not only increased the operational procedures, and Easy to introduce error. The United States “Water and Wastewater Standard Test Method ” a book used to Asia