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1、绪言氮氧化物(NOx)的化学分析法,有苯酚二磺酸法(PDS法),锌还原萘已二胺法(Zn—NEDA法)等。因吸收液对Nox的吸收及其定量操作需要时间,故在短时间内分析大量的样品,是相当困难的。促进吸收液对NOx吸收的方法,有用臭氧氧化吸收NOx的,但是,当排气中有氨,氰化氢等含氮化合物共存时,也同时被氧化吸收产生误差。另外,因臭氧发生器听用氧的纯度等因素的影响,该法有空白实验值高等缺点。作者曾报告过用碱性吸收液吸收NOx,用通常的NOx定量法
1. Introduction The chemical analysis of nitrogen oxides (NOx) includes the phenol disulfonic acid method (PDS method) and the zinc-reduced naphthalene diamine method (Zn-NEDA method). It is quite difficult to analyze a large number of samples in a short period of time because absorption of Nox and its quantitative operation take a long time. However, when nitrogen, hydrogen cyanide and other nitrogen compounds coexist in the exhaust gas, they are also oxidized and absorbed at the same time. In addition, due to the ozone generator to listen to the purity of oxygen and other factors, the method of blank experimental value higher disadvantage. The authors have reported absorption of NOx with alkaline absorption liquid, with the usual NOx quantification method