ASTM D4824-13(2018) PDF

Scope: 1.1 This test method covers the determination of acidity of catalysts and catalyst carriers by ammonia chemisorption. A volumetric measuring system is used to obtain the amount of chemisorbed ammonia. 1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 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.

ASTM D4824-13(2018) Referenced Document

ASTM D3766 Standard Terminology Relating to Catalysts and Catalysis
ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

2024 ASTM D4824-24 Standard Test Method for Determination of Catalyst Acidity by Ammonia Chemisorption
2018 ASTM D4824-13(2018) Standard Test Method for Determination of Catalyst Acidity by Ammonia Chemisorption
2013 ASTM D4824-13 Standard Test Method for Determination of Catalyst Acidity by Ammonia Chemisorption
2003 ASTM D4824-03(2008) Standard Test Method for Determination of Catalyst Acidity by Ammonia Chemisorption
2003 ASTM D4824-03 Standard Test Method for Determination of Catalyst Acidity by Ammonia Chemisorption
1999 ASTM D4824-94(1999) Standard Test Method for Determination of Catalyst Acidity by Ammonia Chemisorption