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ASTM C471M-13

ASTM C471M-13

Standard Test Methods for Chemical Analysis of Gypsum and Gypsum Products (Metric)

2014-11-26 /Historical
Significance and Use:

17.1 This test method covers the determination of calcium sulfate in gypsum and gypsum products by extraction with ammonium acetate solution.


1.1 These test methods cover the chemical analysis of gypsum and gypsum panel products, including gypsum ready-mixed plaster, gypsum wood-fibered plaster, and gypsum concrete.

1.2 The test methods appear in the following order:



Preparation of Sample


Complete Procedure

 5 – 16

Alternative Procedure for Analysis for Calcium Sulfate by Ammonium Acetate Method

17 – 22

Alternative Procedure for Analysis for Sodium Chloride by the Coulometric Method

23 – 29

Determination of Sand in Set Plaster

30 – 36

Wood-Fiber Content in Wood-Fiber Gypsum Plaster

37 – 39

Optional Procedure for Analysis for Sodium by the Atomic Absorption Method

40 – 46

Optional Procedure for Analysis for Sodium by Flame Photometry

47 – 54

Determination of Sulfur (S8) in Gypsum Panel Products by Liquid Extraction for Analysis by Liquid or Gas Chromatography


1.3 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.

1.4 The values stated in SI units are to be regarded as the standard.

1.5 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.

ammonium acetate method; atomic absorption; chemical analysis; coulometric method; flame photometry; gas chromatography &ndash; electron capture detector; gas chromatography &ndash; mass spectrometry; gypsum; gypsum concrete; gypsum board; gypsum products; high-performance liquid chromatography &ndash; UV detector; plaster; sand in set plaster; sulfur (S<inf>8</inf>); wood-fiber plaster
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