【国外标准】 Standard Test Methods for Chemical Analysis of Gypsum and Gypsum Products (Metric)

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.