ASTM C471M-17a

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

Información:

Fecha:

2018-01-01 /Historical

Superseeded by:

C471M-20a

Scope:

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.

Keywords:

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

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