PROCESS OF PRODUCTION OF CALIBRATION MIXTURES OF POLAR LOW- VOLATILE ORGANIC SUBSTANCE IN ATMOSPHERE

摘要

FIELD: preparation of calibration mixtures. SUBSTANCE: characteristic feature of process consists in deposition of solid and liquid substances on surface of solid carrier in the form of multicomponent mixture with practically ideal properties or with positive deviations from Raoult's law and mass share of weighed-out substances from 20 to 40 per cent and in setting it in thermostated batcher coming in the form of chromatographic column. Temperature in column should not exceed temperature of thermal-oxidation decomposition of weighed-out substances. Gas carrier of constant temperature is passed through batcher. Masses of individual compounds in multicomponent mixture of polar low-volatile organic substances in batcher at start and in process of production of calibration mixture are established by injection of microdose of benzene, air and normal alkanes C1-C10 into batcher connected to thermal conductivity detector. EFFECT: increased precision in preparation of microconcentrations of multicomponent mixtures of polar low-volatile organic substances in air atmosphere for calibration of gas analyzing devices. 1 cl, 1 dwg, 3 tbl