A symmetrical vacuum thermoblance for corrosive atmospheres.

Abstract

A vacuum thermobalance with symmetrical hang-down and furnace system for samples between 0·1 and 500 mg is described. Flow of nearly every corrosive gas at any constant pressure in the range 0·1 torr to 1 atm can be applied. Zero drift is below 1 μg from 20 to 900°C. As examples of the application are mentioned the reactions in hydrogen chloride atmosphere of tris(ethylendiamine)-and tris(trimethylendiamine) chromium(III) chloride under formation of cis- and trans-dichloro complexes, respectively.