ASTM International - ASTM E928-19

Standard Test Method for Purity by Differential Scanning Calorimetry

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Organization: ASTM International
Publication Date: 1 May 2019
Status: active
Page Count: 8
ICS Code (Heat. Calorimetry): 17.200.10
significance And Use:

5.1 The melting temperature range of a compound broadens as the impurity level rises. This phenomenon is described approximately by the van't Hoff equation for melting point depressions. Measuring... View More

scope:

1.1 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.

1.2 This test method is applicable to thermally stable compounds with well-defined melting temperatures.

1.3 Determination of purity by this test method is only applicable when the impurity dissolves in the melt and is insoluble in the crystal.

1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Document History

ASTM E928-19
May 1, 2019
Standard Test Method for Purity by Differential Scanning Calorimetry
1.1 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. 1.2 This test...
August 15, 2014
Standard Test Method for Purity by Differential Scanning Calorimetry
5.1 The melting temperature range of a compound broadens as the impurity level rises. This phenomenon is described approximately by the van’t Hoff equation for melting point depressions. Measuring...
September 1, 2008
Standard Test Method for Determination of Purity by Differential Scanning Calorimetry
The melting temperature range of a compound broadens as the impurity level rises. This phenomenon is described approximately by the van't Hoff equation for melting point depressions. Measuring and...
March 10, 2003
Standard Test Method for Determination of Purity by Differential Scanning Calorimetry
1.1 This 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. 1.2 This test method is...
February 10, 2001
Standard Test Method for Determination of Purity by Differential Scanning Calorimetry
1.1 This test method covers the determination of purity by use of differential scanning calorimetry and the evaluation of the results using the van't Hoff equation. 1.2 This test method is generally...
February 10, 2001
Standard Test Method for Determination of Purity by Differential Scanning Calorimetry
1.1 This test method covers the determination of purity by use of differential scanning calorimetry and the evaluation of the results using the van't Hoff equation. 1.2 This test method is generally...
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