用缓冲的甲醛吸收液测定大气中二氧化硫方法的探讨

A discussion on the method of determination of sulfur dioxide in atmosphere with buffer absorbing solution of formaldehyde

在国内外研究甲醛吸收液测定大气中二氧化硫的基础上,进一步较全面对其操作条件做了探讨,并与传统方法四氯汞钾吸收液进行对比,其灵敏度、精密度均高于传统方法,效果令人满意.吸收液中的氮氧化物、臭氧、重金属等掩蔽后不影响测定.

An overall discussion is presented in this paper for the operating conditions of determination of sulfur dioxide in atmosphere with buffer absorbing solution of formaldehyde based on home and overseas researching results. Traditional mercuric potassium tetrachloride method is compared with this new method. It demonstrates that the new method is superior to the traditional method in sensitivity and precision. The results are satisfactory. Determination is not influenced by NO2, O3, heavy metal in absorbing solution after sheltered.