レーザー発光分光法による大気浮遊粒子中の多元素分析

概要

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Multielement analysis of individual air-borne particulates is nesessary for air-pollution research (e.g., search for their origins). Particles are collected on a Mylar film by a cascade impactor at a fllow-rate of 9 liter per minute for 1 hour. The Mylar film is supported on a hollow tube after drying. A particle suitable for analysis is selcted microscpically, evaporated by a laser beam emitted from neodymium glass, and excited by a high voltage spark discharge (lOOμH, 6μF, 1Ω, and 2.5kv). Magnesium, aluminium, silicon, calcium, iron, copper, and zinc are detected in particles of 4, 6, 8, and lOμm diam. The content of light elements seems to be greater than that of heavey elments. The amount of each element increases with increasing particle size. The chemical composition of each particle differ in spite of the same diameter, and the variation of spectral line intensity of heavey elments seems to be slightly larger than that of light elements.
社団法人日本分析化学会の論文
1975-05-10