Ten inorganic elements were monitored.The results indicated that concentrations of inorganic elements in haze days were higher than normal days.The variety of the measured elements was similar between haze and nor-mal days.Among all detected inorganic elements,the major proportion in content was shared by SO2-4 and NO3-, which followed by NH4+,Ca2+,Cl-and K+.Other elements were little.It is showed that inorganic elements were mainly from vehicle emission,straw burning,industrial emission,and construction dust.%分析了灰霾天气与非灰霾天气下的PM2.5中的无机元素浓度特征，结果表明 PM2.5中无机元素的质量浓度在灰霾期间高于非灰霾期，同时灰霾与非灰霾间所测元素的分布特征基本一致，SO42ˉ、NO3ˉ浓度所占比例较大，NH4＋、Ca2＋、Clˉ、K＋浓度次之，其他元素含量很低。主要来源为机动车尾气、秸秆焚烧、工业企业排放、施工扬尘。
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