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:

Section(s)

Preparation of Sample

4

Complete Procedure

5 – 16

Alternative Procedure for Analysis of Free Water in Gypsum
     Using a Moisture Balance

17

Alternative Procedure for Analysis of Combined Water in Gypsum
     Using a Moisture Balance

18

Alternative Procedure for Analysis for Calcium Sulfate by
     Ammonium Acetate Method

19

Alternative Procedure for Analysis for Sodium Chloride by the
     Coulometric Method

20

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
     Absorption Method

23

Optional Procedure for Analysis for Sodium by Flame Photometry

24

Determination of Orthorhombic Cyclooctasulfur (S₈) in Gypsum
     Panel Products—General Provisions

25

Determination of Orthorhombic Cyclooctasulfur (S₈) in Gypsum
     Panel Products by Gas Chromatograph Equipped with a Mass Spectrometer (GS/MS)

26

Determination of Orthorhombic Cyclooctasulfur (S₈) in Gypsum
     Panel Products by Gas Chromatograph
     Equipped with an Electron Capture Detector (GC/ECD)

27

Determination of Orthorhombic Cyclooctasulfur (S₈) in Gypsum
     Panel Products by High-performance Liquid Chromatograph
     Equipped with and Ultraviolet Detector (HPLC/UV)

28

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

1.4 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.

1.5 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.