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Instrumentation has been developed which employs standard x-ray diffraction equipment and an energy dispersive analyzer for elemental and phase analysis. A General Electric XRD-6 diffractometer, a sample chamber, a Nuclear Semiconductor energy dispersive analyzer (EDA) with 155 eV resolution, and a Tracor Northern multichannel analyzer are its main components.

Continuous thermogravimetric analysis is widely employed in several fields of study, such as oxidation of metals, degradation of resins, adsorption on catalysts, magnetic properties, etc. Precision electrobalances available on the market provide an extremely sensitive means of measuring weight changes. The balance output voltage is recorded as a function of time, usually by a pen-recorder which can be coupled with an automatic range expander. However, this data-recording method often does not match the sensitivity of the balance, and its reliability may be impaired by failures such as nonconstancy of the

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