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 These 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 of Organic Material

19

     and Carbon Dioxide in Gypsum by High Temperature

     Weight Loss

Alternative Procedure for Analysis for Calcium Sulfate by

20

     Ammonium Acetate Method

Alternative Procedure for Analysis for Sodium Chloride by

21

     the Coulometric Method

Determination of Sand in Set Plaster

22

Wood-fiber Content in Wood-fiber Gypsum Plaster

23

Optional Procedure for Analysis for Sodium by the Atomic

24

     Absorption Method

Optional Procedure for Analysis for Sodium by Flame

25

     Photometry

Determination of Orthorhombic Cyclooctasulfur (S₈) in

26

     Ggypsum Panel Products—General Provisions

Determination of Orthorhombic Cyclooctasulfur (S₈) in

27

     Gypsum Panel Products by Gas Chromatograph

     Equipped with a Mass Spectrometer (GS/MS)

Determination of Orthorhombic Cyclooctasulfur (S₈) in

28

     Gypsum Panel Products by Gas Chromatograph

     Equipped with an Electron Capture Detector (GC/ECD)

Determination of Orthorhombic Cyclooctasulfur (S₈) in

29

     Gypsum Panel Products by High-performance Liquid

     Chromatograph Equipped with and Ultraviolet Detector

     (HPLC/UV)

1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in these test methods.

1.4 These text of this test method 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.

1.5 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.