Abstract
A rapid and simple method for determining nitrogen oxides (NOx), sulfur oxides (SOx), and hydrogen chloride (HCl) in exhaust gases has been investigated. A mixture of 5 ml of 0.5 N sodium hydroxide and 25 ml of 1.0 % hydrogen peroxide was placed in a 1l flask, and about 800 ml of sample gas and 200 ml of oxygen were introduced. The NOx, SOx, and HCl in the sample gas were absorbed in 5 min and converted to nitrate, sulfate, and chloride ions, respectively, which were then determined by ion chromatography. Only about 20 min were required for the determination. The analytical data of NOx, SOx, and HCl in municipal refuse incineration exhaust gases by the present method were in fair agreement with those obtained by Zn-reduction NEDA method, precipitation titration method, and Hg(SCN) method, respectively.
