FIELD: chemistry.
SUBSTANCE: invention can be used for separating and determining osmium in objects of different composition. Method of determining osmium in gas phase, including oxidation thereof and distillation from solution, capturing with sorbent, reducing osmium (VIII) to osmium (III), conversion thereof into a complex compound on surface of sorbent, measuring diffuse reflection factor of osmium surface complex and content of osmium from a calibration curve, for extraction of osmium from gas phase using silica gel, chemically modified with N-(1,3,4-thiodiazole-2-thiol)-N′-propylurea groups, and measurement of diffuse reflection factor of osmium (III) surface complex is carried out at 430 nm.
EFFECT: higher sensitivity of analysis.
1 cl, 3 ex
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