Differential Thermogravimetry

Abstract

THE methods of differential thermal analysis and thermogravimetry have been used in parallel for thermal investigations of analytical precipitates¹. This double method possesses obviously the advantage that the same thermal change can be observed and characterized by the loss of weight and the change of temperature simultaneously, the two sets of measurements checking each other, or indicating by differences of results some changes which could not otherwise have been observed. In addition, the differential thermal analysis method completes the thermogravimetry measurements in the case when no loss of weight occurs. On the basis of thermogravimetry results, accurate quantitative conclusions may be drawn, which can scarcely be made with thermograms obtained by differential thermal analysis. During our investigations materials have also been studied which, for some reason (for example, melting), could not be subjected to differential thermal analysis. This gave rise to the idea of a differential thermo-gravimetric method and we succeeded in developing and applying this procedure.