SOLID SORBENT GAS SAMPLERS *

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Abstract
Many solids can be used to collect gases and vapours from air. The techniques involved are reviewed from the literature of the last 20 yr. Materials considered are charcoal, porous polymers, compositions normally used for gas–liquid chromatography, silica gel, clathrate silicates, alumina and other miscellaneous solids. A description is given of these materials, their pretreatment and the physical form for optimum performance. Practical matters discussed include designs of sampler tubes and techniques of collection and desorption. There is a theoretical section and finally an account of applications, particular attention being given to those of a special nature.