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ASTM D5296-97

Historical Revision

Standard Test Method for Molecular Weight Averages and Molecular Weight Distribution of Polystyrene by High Performance Size-Exclusion Chromatography

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1.1 This test method covers the determination of molecular weight (MW) averages and the distribution of molecular weights for linear, soluble polystyrene by liquid high performance size-exclusion chromatography (HPSEC). This test method is not absolute and requires the use of commercially available narrow molecular weight distribution (MWD) polystyrene standards for calibration. This test method is applicable for samples containing molecular weight components that have elution volumes falling within the elution volume range defined by polystyrene standards (that is, molecular weights generally from 2000 to 2000000 g[dot]mol -1 ).

1.2 HPSEC is differentiated from traditional size-exclusion chromatography SEC (also referred to as gel permeation chromatography (GPC)) in that the number of theoretical plates generated per second with an HPSEC system is about ten times greater than that for traditional SEC (see Terminology D883 and Practice D3016). HPSEC systems employ low-volume liquid chromatography components and columns packed with relatively small (generally 3 to 20 [mu]m) microporous particles. High performance liquid chromatography instrumentation and automated data handling systems for data acquisition and processing are required.

1.3 The values stated in SI units are to be regarded as the standard.

1.4 This standard does not purport to address all of the safety problems, 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. Specific precautionary statements are given in Section 9.


SDO ASTM: ASTM International
Document Number D5296
Publication Date Nov. 10, 1997
Language en - English
Page Count 14
Revision Level 97
Supercedes
Committee D20.70
Publish Date Document Id Type View
Nov. 1, 2019 D5296-19 Revision
Sept. 1, 2011 D5296-11 Revision
March 1, 2005 D5296-05 Revision
Nov. 10, 1997 D5296-97 Revision