大気中気体状および粒子状硫黄の螢光X線分析法による同時分析 (I)
1978 年 13 巻 1 号 p. 10-16
詳細
1978 年 13 巻 1 号 p. 10-16
An analytical technique for the simultaneous measurements of the atmospheric concentrations of SO2 gas and sulfur absorbed by aerosol particles has been developed. Aerosol particles are collected on membrane filter and at the same time SO2 gas is captured on alkali impregnated filter. The sulfur content in each filter is measured by an energy dispersive X-ray fluorescence spectrometer consisting of a Si (Li) semi-conductor detector connected to a multi-channel pulse height analyzer and an excitation source of 55Fe. Two methods are acceptable for the determination of the sulfur content in impregnated filter by X-ray fluorescence analysis. In the first method X-ray fluorescence analysis is made after the collected sulfur has diffused and distributed uniformly enough throughout filter, and in the second method X-ray fluorescence analysis has to be finished before the diffusion of the collected sulfur becomes appreciable. It was confirmed that the method developed can be applied to practical observation with sufficientreliability.
