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:

Sections

Preparation of Sample

4

Complete Procedure

5 – 16

Alternative Procedure for Analysis of Free Water in

17

     Gypsum Using a Moisture Balance

Alternative Procedure for Analysis of Combined Water in

18

     Gypsum Using a Moisture Balance

Alternative Procedure for Analysis for Calcium Sulfate by

19

     Ammonium Acetate Method

Alternative Procedure for Analysis for Sodium Chloride by

20

     the Coulometric Method

Determination of Sand in Set Plaster

21

Wood-Fiber Content in Wood-Fiber Gypsum Plaster

22

Optional Procedure for Analysis for Sodium by the Atomic

23

     Absorption Method

Optional Procedure for Analysis for Sodium by Flame

24

     Photometry

Determination of Orthorhombic Cyclooctasulfur (S₈) in

25

     Ggypsum Panel Products—General Provisions

Determination of Orthorhombic Cyclooctasulfur (S₈) in

26

     Gypsum Panel Products by Gas Chromatograph

     Equipped with a Mass Spectrometer (GS/MS)

Determination of Orthorhombic Cyclooctasulfur (S₈) in

27

     Gypsum Panel Products by Gas Chromatograph

     Equipped with an Electron Capture Detector (GC/ECD)

Determination of Orthorhombic Cyclooctasulfur (S₈) in

28

     Gypsum Panel Products by High-performance Liquid

     Chromatograph Equipped with and Ultraviolet Detector

     (HPLC/UV)

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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.6 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.