1987 Volume 2 Issue 4 Pages 294-303
The analysis for the size-dependent chemical composition of atmospheric aerosols is useful for the recognition of their sources and behavior. In the present work, atmospheric aerosols within range of diameter 0.06-50 μm were classified into 12 fractions and chemically analyzed after separating into water-soluble and insoluble fractions.
Atmospheric aerosols were collected in Nagoya by the use of a 12 stage Andersen air sampler which consists of an ordinary Andersen air sampler with 8 impactor stages joined with low pressure impactor of 4 stages for collecting of fine particles. Water soluble fractions in each sample were analyzed by inductively coupled plasma emission spectrometry (ICP-AES) for Na, Mg, Al, P, K, Ca, Ti, V, Mn, Fe, Ni, Cu, Zn, Sr, Cd, and Pb and by ion chromatography (I. C.) for NH4+. Cl-. NO3-, and SO42-. And the insoluble fractions in the samples were analyzed by ICP-AES after acid digestion with HNO3+HF+HClO4 (10 : 1 : 1 ). The following informations were obtained. (1) The characteristic peak profiles in the fine particle range of size distribution curves have been directly observed in detail for NH4+, SO42-, V, Zn, Pb, and other 9 elements. (2) The contents of the water soluble fraction of most elements in the fine particle range are higher than those in coarse particle range. (3) The profiles of size distribution curve in the total concentration of each element depend on the ralative contributions of water soluble and insoluble fractions, and the evaluation of them from both fractions by the separate-analysis will be useful for the consideration of sources and state of atmospheric aerosols.
