随着环保部和中国环境监测总站对标准的更新，非分散红外吸收法测定固定污染源废气中二氧化硫和氮氧化物已列入国家环境监测标准方法，并在各级环境监测站中逐渐普及应用。同时，作为国家标准的定电位电解法依然在用，且测量的可靠性、稳定性能良好。在相同环境下使用两种方法同时测定同一污染源废气中的二氧化硫和氮氧化物，探讨了其结果间产生偏差的原因，并对各种影响因素进行了分析和评价。%The undispersed infrared absorbing method which is used to determine the sulfur dioxide and nitrogen oxide from the exhaust gas of stationary polution source has been identiifed as the National Environmental Monitoring Standard Method. The existing constant potential electrolysis as the effective national standard has been used currently with the advantage of the stability and accuracy of measurement. The same stationary polution source is determined by using the two methods under the same environmen. The paper probes into the reason that brings windage from the results and makes analysis on different affected factors.
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