ASTM D4926-25
Standard Test Method for Gamma Alumina Content in Catalysts and Catalyst Carriers Containing Silica and Alumina by X-ray Powder Diffraction
| Označení normy: | ASTM D4926-25 |
| Vydáno: | 01.09.2025 |
| Status: | Active |
| Počet stran: | 3 |
| Sekce: | 05.06 |
| Označení: | alumina; catalyst; catalyst carrier; gamma alumina; gamma alumina content; X-ray powder diffraction ; |
| ASTM označení: | ASTM D4926 |
| Nahrazuje: | D4926-20 |
1.1 This test method covers the determination of gamma alumina and related transition aluminas in catalysts and catalyst carriers containing silica and alumina by X-ray powder diffraction, using the diffracted intensity of the peak occurring at about 67 °2θ when copper Kα radiation is employed.
1.2 Units—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, 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.