• 关键词：

• 基金项目：

• 林国珍
• 中国科学院环境化学研究所

• 茅世森
• 中国科学院环境化学研究所

• 王庆广
• 中国科学院环境化学研究所

• 摘要：本工作采用丙酮一二碘甲烷重液体系,对北京的大气颗粒物进行了密度梯度分级处理.各级样品的X射线粉晶衍射分析表明,其中含有十七种物相.对污染物来源作了初步讨论.

• Abstract：X-ray powder diffraction analysis of fractions of airborne particulates has been carried out by density gradient separation method with sequential extraction of acetone-methylene iodide mixtures. 17 compounds were identified from the airborne particulates in Beijing area and analytical results for the fractions were used to characterize the chemical states for some of the constituents of particulates.

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