ASTM C471M : 20a

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

Standard Details

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 StandardDetails, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.