ASTM E 1791 : 1996 : R2021
Current
The latest, up-to-date edition.
Standard Practice for Transfer Standards for Reflectance Factor for Near-Infrared Instruments Using Hemispherical Geometry
Hardcopy , PDF
English
09-10-2021
Important note : All end users must be registered with an Account prior to user licenses being assigned.| Committee |
E 13
|
| DocumentType |
Standard Practice
|
| Pages |
4
|
| PublisherName |
American Society for Testing and Materials
|
| Status |
Current
|
| Supersedes |
1.1This practice covers procedures for the preparation and use of acceptable transfer standards for NIR spectrophotometers. Procedures for calibrating the reflectance factor of materials on an absolute basis are contained in CIE Publication No. 44 (9). Both the pressed powder samples and the sintered PTFE materials are used as transfer standards for such calibrations because they have very stable reflectance factors that are nearly constant with wavelength and because the distribution of flux resembles closely that from the perfect reflecting diffuser.
1.2The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3This 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.
1.4This 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 E 131 : 2010 : R2023 | Standard Terminology Relating to Molecular Spectroscopy |
| ASTM E 284 : 2022 | Standard Terminology of Appearance |
| ASTM E 131 : 2010 : R2015 | Standard Terminology Relating to Molecular Spectroscopy |
| ASTM E 259 : 2006 : R2015 | Standard Practice for Preparation of Pressed Powder White Reflectance Factor Transfer Standards for Hemispherical and Bi-Directional Geometries (Withdrawn 2024) |
| ASTM E 284 : 2017 | Standard Terminology of Appearance |
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