Abstract
An analytical technique for the simultaneous measurement 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) semiconductor detector connected to a multichannel pulse height analyzer and an excitation source of55Fe. 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 the filter, and in the second method X-ray fluorescence analysis has to be finished before the diffusion of the collected sulfur becomes appreciable. Some results of simultaneous analysis of SO2 gas and particulate sulfur in the atmosphere are presented.
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