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ASTM D4222-98

Historical Revision

Standard Test Method for Determination of Nitrogen Adsorption and Desorption Isotherms of Catalysts By Static Volumetric Measurements

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1.1 This test method covers the determination of nitrogen adsorption and desorption isotherms of catalysts and catalyst carriers at the boiling point of liquid nitrogen. A static volumetric measuring system is used to obtain about thirty equilibrium adsorption points on each branch of the isotherm, these points being evenly spread over the isotherm.

1.2 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.


SDO ASTM: ASTM International
Document Number D4222
Publication Date March 10, 1998
Language en - English
Page Count 6
Revision Level 98
Supercedes
Committee D32.01
Publish Date Document Id Type View
Oct. 1, 2020 D4222-20 Revision
Oct. 1, 2003 D4222-03 Revision
March 10, 1998 D4222-98 Revision
April 1, 2015 D4222-03R15E01 Reaffirmation
April 1, 2008 D4222-03R08 Reaffirmation