空气中二氧化硫测定方法的思考

Consideration on determination method of sulfur dioxide in air

测定空气中二氧化硫的方法主要有2种:一是四氯汞钾-盐酸副玫瑰苯胺分光光度法;二是甲醛缓冲液-盐酸副玫瑰苯胺分光光度法。利用四氯汞钾-盐酸副玫瑰苯胺分光光度法时所用的试剂是甲醛缓冲溶剂,利用甲醛缓冲液-盐酸副玫瑰苯胺分光光度法所利用的试剂也可以是甲醛缓冲溶剂。介绍利用2种方法测定空气中的二氧化硫,并比较2种方法的结果。

There are two main methods for the determination of sulfur dioxide in air,one is mercuric tetrachloride-pararosaniline hydrochloride spectrophotometric method,the other is the formaldehyde buffer solution-pararosaniline hydrochloride spectrophotometric method.The reagent used in the both process of mercuric tetrachloride-pararosaniline hydrochloride spectrophotometric method and the reagent used in the process of formaldehyde buffer solution-pararosaniline hydrochloride spectrophotometric method can be formaldehyde buffer solution.This article will introduce that how to use the two methods to determine the air of sulfur dioxide,and compare the results of these two methods.