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Thermal decomposition of immobilized compounds for the generation of gaseous standard mixtures containing ammonia and amines

Research paper by Piotr Konieczka, Magdalena Prokopowicz, Anna Skwierawska, Andrzej Przyjazny, Jacek Namieśnik, Jan F. Biernat

Indexed on: 01 Sep '97Published on: 01 Sep '97Published in: Microchimica Acta



Abstract

The thermal decomposition of phthalamic acid derivatives chemically bonded to the surface of silica gel was examined and utilized for the generation of single-component gaseous standard mixtures of ammonia, methylamine, diethylamine and triethylamine. The conditions of the thermal decomposition (temperature, time, diluent gas flow rate) were optimized to ensure complete liberation and rapid elution of the compounds from the bed of modified silica gel. The total amounts of these four compounds that can be released from unit mass of the modified silica gel are in the range of several mg.