【摘要】 [目的]研究上海大气微小颗粒物中的金属元素、可溶性离子、有机碳（OC）、无机碳（EC）的化学组成特征。[方法]对上海市5个采样点的PM_2.5样品进行了化学成分分析,用离子色谱法分析可溶性离子,用能量色散X荧光（EDXRF）法分析16种金属元素,用热碳分解法分析有机碳和无机碳,用气相色谱-质谱联用（GC-MS）定性分析可溶性有机物。[结果]各监测点PM_2.5样品中可溶性离子含量约占35%,总碳约占40%,金属元素所占份额不到10%,其余为未知物的质量,约占15%。[结论]初步得到上海市PM_2.5的化学组成特征。更多还原

【Abstract】 [Objective]To study the chemical component of element,soluble ion and organic carbon（OC）/elemental carbon（EC） in PM_2.5 in the atmosphere of Shanghai.[Methods] The chemical component in PM_2.5 of 5 sampling sites in Shanghai was.analyzed. Major soluble ion was tested by ion chromatogram,16 elements were tested by engery dispersive x-ray fluorescence（EDXRF）,EC and OC were tested by thermal decomposition and soluble organic components were tested by full spectral analysis of gas chromatography-mass spectrometry（GC-MS）.[Results] Major soluble ion occupies 35% of PM_2.5 sample,TC occupies 40%,element matter occupies less than 10%,others are unknown matter.[Conclusion] The chemical component of PM_2.5 in Shanghai has been identified.更多还原