ASTM D934-22
Standard Practices for Identification of Crystalline Compounds in Water-Formed Deposits By X-Ray Diffraction

Standard No.

ASTM D934-22

Release Date

2022

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM D934-22

Scope

1.1 These practices provide for X-ray diffraction analysis of powdered crystalline compounds in water-formed deposits. Two are given as follows: Sections Practice A—Camera 12 to 21 Practice B—Diffractometer 22 to 30 1.2 Both practices yield qualitative identification of crystalline components of water-formed deposits for which X-ray diffraction data are available or can be obtained. Greater difficulty is encountered in identification when the number of crystalline components increases. 1.3 Amorphous phases cannot be identified without special treatment. Oils, greases, and most organic decomposition products are not identifiable. 1.4 The sensitivity for a given component varies with a combination of such factors as density, degree of crystallization, particle size, coincidence of strong lines of components and the kind and arrangement of the atoms of the components. Minimum percentages for identification may therefore range from 1 % to 40 %. 1.5 The values stated in SI units are to be regarded as standard. The values listed in parenthesis are for information only. 1.6 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. Specific precautionary statements are given in Section 8 and Note 20. 1.7 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 D934-22 Referenced Document

• ASTM D1129 Standard Terminology Relating to Water
• ASTM D1193 Standard Specification for Reagent Water
• ASTM D2331 Standard Practices for Preparation and Preliminary Testing of Water-Formed Deposits
• ASTM D887 Standard Practices for Sampling Water-Formed Deposits
• ASTM D933 Standard Practice for Reporting Results of Examination and Analysis of Water-Formed Deposits
• ASTM E11 Standard Specification for Wire Cloth and Sieves for Testing Purposes

ASTM D934-22 history

• 2022 ASTM D934-22 Standard Practices for Identification of Crystalline Compounds in Water-Formed Deposits By X-Ray Diffraction
• 2013 ASTM D934-13 Standard Practices for Identification of Crystalline Compounds in Water-Formed Deposits By X-Ray Diffraction
• 2008 ASTM D934-08 Standard Practices for Identification of Crystalline Compounds in Water-Formed Deposits By X-Ray Diffraction
• 1980 ASTM D934-80(2003) Standard Practices for Identification of Crystalline Compounds in Water-Formed Deposits By X-Ray Diffraction
• 1999 ASTM D934-80(1999) Standard Practices for Identification of Crystalline Compounds in Water-Formed Deposits By X-Ray Diffraction