以激光磁共振方法研究氮氧化物与二氯甲烷、三氯甲烷、四氯甲烷、1、2—二氯乙烷在紫外光照射和火花放电条件下的化学反应，实验结果表明氯代烷烃与NO／NO2在火花放电、紫外光照射条件下发生快速化学反应．所获得的信息对了解大气化学反应及光化学烟雾有着重要的意义． The chemical reaction of nitrogen oxides with dichloromethane, trichloromethane, tetrachloromethane and 1,2-dichloroethane under ultraviolet light irradiation and spark discharge was studied by laser magnetic resonance method. The experimental results showed that the reaction between chlorinated alkanes and NO / NO2 in the spark discharge, ultraviolet irradiation under the conditions of rapid chemical reaction. The information obtained is of great importance for understanding atmospheric chemical reactions and photochemical smog.