R. Belcher, L. Erdey, F. Paulik
Jul 1, 1960
Citations
0
Influential Citations
14
Citations
Journal
Talanta
Abstract
Abstract Derivatographic measurements have shown that the decomposition of potassium hydrogen phthalate, which is often used as a primary standard, begins at 190–200°. The non-hygroscopic preparation can be dried between 100° and 150°. Decomposition proceeds in three steps, the rate depending on the rate of increase of temperature. Dipotassium phthalate is formed first, phthalic anhydride and water being removed. Enthalpy changes can also be obtained from the derivatograms; this yields information on the further mechanism of thermal decomposition and changes of state of the sample.