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ASTM D2503-92(2016)

Current Revision

Standard Test Method for Relative Molecular Mass (Molecular Weight) of Hydrocarbons by Thermoelectric Measurement of Vapor Pressure (Withdrawn 2022)

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1.1 This test method covers the determination of the average relative molecular mass (molecular weight) of hydrocarbon oils. It can be applied to petroleum fractions with molecular weights (relative molecular mass) up to 3000; however, the precision of this test method has not been established above 800 molecular weight (relative molecular mass). This test method should not be applied to oils having initial boiling points lower than 220 °C.

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

1.3 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 and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, 5.2.1, 5.2.3, and 5.2.3.


3.1 Relative molecular mass (molecular weight) is a fundamental physical constant that can be used in conjunction with other physical properties to characterize pure hydrocarbons and their mixtures.

3.2 A knowledge of the relative molecular mass (molecular weight) is required for the application of a number of correlative methods that are useful in determining the gross composition of the heavier fractions of petroleum.

SDO ASTM: ASTM International
Document Number D2503
Publication Date Oct. 1, 2016
Language en - English
Page Count 3
Revision Level 92(2016)
Supercedes
Committee D02.04.0D
Publish Date Document Id Type View
Oct. 1, 2016 D2503-92R16 Revision
Not Available D2503-82R87E01 Revision
April 15, 2012 D2503-92R12 Reaffirmation
Nov. 1, 2007 D2503-92R07 Reaffirmation
Aug. 15, 1992 D2503-92R02E01 Reaffirmation
Jan. 1, 1992 D2503-92R97 Reaffirmation