ASTM-D4926 Historical Revision Information
Standard Test Method for Gamma Alumina Content in Catalysts Containing Silica and Alumina by X-Ray Powder Diffraction

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Standard Test Method for Gamma Alumina Content in Catalysts and Catalyst Carriers Containing Silica and Alumina by X-ray Powder Diffraction


1.1 This test method covers the determination of gamma alumina and related transition aluminas in catalysts containing silica and alumina by X-ray powder diffraction, using the diffracted intensity of the peak occurring at about 67°20 when copper Kα radiation is employed.

1.2 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.


alumina; catalysts; gamma alumina; gamma alumina content; x-ray powder diffraction

To find similar documents by ASTM Volume:

05.05 (Combustion Characteristics; Manufactured Carbon and Graphite Products; Catalysts)

05.06 (Gaseous Fuels; Coal and Coke)

To find similar documents by classification:

71.040.30 (Chemical reagents Including reference materials)

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Document Number


Revision Level

1989 R94(E1) EDITION



Modification Type

Reapproval with Ed Change

Publication Date

April 1, 1994

Document Type

Test Method

Page Count

2 pages

Committee Number