测定H_2S含量已成为环境保护和工业生产中的重要课题。测定方法很多,工业气体中的H_2S用碘量法和亚甲蓝比色法较多,但灵敏度不够高且耗时较长。本文用Zn(AC)_2—HAC作为吸收液,NaOH—EDTA—抗坏血酸为抗氧化剂,硫化银电极为指示电极,对北京焦化厂生产的煤气和经ZnO脱硫的工业气体中H_2S的含量进行了测定,并用计算机进行数据处理,所得结果与亚甲蓝法相符。灵敏度高并且操作简便,节省时间。 Determination of H 2 S content has become an important issue in environmental protection and industrial production. Determination of many ways, industrial gases H_2S iodine method and methylene blue colorimetric method more, but not high enough sensitivity and time-consuming. In this paper, Zn (AC) 2-HAC was used as absorbing solution, NaOH-EDTA-ascorbic acid as anti-oxidant and silver sulfide electrode as indicator electrode to determine the content of H 2 S in the gas produced by Beijing Coking Plant and the industrial gas deoxidized by ZnO , And using computer data processing, the results obtained and methylene blue method. High sensitivity and easy to operate, saving time.