This test method describes the determination of purity of materials greater than 98.5 mole percent purity using differential scanning calorimetry and the van’t Hoff equation. This test method is applicable to thermally stable compounds with well-defined melting temperatures.
WJE laboratories are accredited by ANAB (ISO/IEC 17025) to perform testing standard ASTM E928 for Purity by Differential Scanning Calorimetry.
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KeywordsASTM E928 - Chemical Composition - Differential Scanning Calorimetry - Impurities - Purity
ICS CODE17.200.10 (Heat. Calorimetry.)
ASTM E928-19, Standard Test Method for Purity by Differential Scanning Calorimetry, ASTM International, West Conshohocken, PA, 2019, www.astm.org