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阐述了化学发光法氮氧化物分析仪的工作原理，分析了钼炉转化效率的测定方法并进行了试验。结果表明，在测试中无需知道臭氧浓度，只要加入不过量的臭氧，即可准确测试钼炉的转化效率。“,”This paper briefly describes the chemiluminescence method principle of nitrogen oxides analyzer,analyse the test method of convert efficiency for molybdenum converter and make the experiment. Results indicates that we still accurate tested the efficiency of conversion of molybdenum converter when we don’t know the accurate ozone concentration, as long as we add the ozone not excessive in gas flow.