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Abstract
The aim of the paper is to refer to the influence of water vapour after the sampling at the detection of sulphate particles. Gelatine layers with barium chloride, cellophane and collodion layers were tested. Gelatine layers were prepared by using the diffusion method. After cooling to ? 80° and heating to + 180° they did not lose the capacity to enter into reaction with sulphate particles. The exposure of the layers to the influence of the air saturated with water vapour is recommended.DOI: 10.1111/j.2153-3490.1966.tb00229.x