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本文介绍了一种用聚苯乙烯做滤料,高容量采样器采集大气中的尘粒,在400～425℃的高温炉中干灰化,而后用HCl-HF和HNO_3分解残渣,再将样品分为若干份,适当稀释,加入控制基体的物质,最后用原子吸收法测定大气尘粒中22种金属元素。比较了常用的滤料如玻璃纤维,纤维素滤纸及滤膜的性能,综合了过去原子吸收法测定金属元素的种种方法提出以下操作步骤: 用高容量采样器将大气中的尘粒采集
In this paper, a kind of filter made of polystyrene, high-capacity sampler was used to collect the dust particles in the atmosphere. After drying in ashing furnace at 400 ~ 425 ℃, the residue was decomposed by HCl-HF and HNO_3, Divided into several copies, appropriate dilution, adding control matrix material, and finally by atomic absorption method for the determination of atmospheric dust 22 kinds of metal elements. Comparing the performance of commonly used filter media such as glass fiber, cellulose filter paper and filter membrane, the methods of past atomic absorption spectrometry for metal element determination are proposed. The following operation steps are proposed: the dust particles in the atmosphere are collected by high-capacity sampler