1.1 这些测试方法涵盖了石膏和石膏板产品的化学分析，包括石膏预拌石膏、石膏木纤维石膏和石膏混凝土。 1.2 这些测试方法按以下顺序出现: 小节 样品的制备 4. 完成程序 5 – 16 水中游离水分析的替代程序 17 使用水分平衡的石膏 混合水分析的替代程序 18 使用水分平衡的石膏 有机物分析的替代程序 19 高温下石膏中的二氧化碳 体重减轻 硫酸钙分析的替代程序 20 醋酸铵法 氯化钠分析的替代程序 21 库仑法 石膏中砂的测定 22 木纤维石膏灰泥中的木纤维含量 23 原子吸收光谱法分析钠的可选程序 24 吸收法 火焰分析钠的可选程序 25 光度测定 正交环八硫的测定 8. )在 26 Ggypsum面板产品一般规定 正交环八硫的测定 8. )在 27 气相色谱仪测定石膏板产品 配备质谱仪（GS/MS） 正交环八硫的测定 8. )在 28 气相色谱仪测定石膏板产品 配备电子捕获检测器（GC/ECD） 正交环八硫的测定 8. )在 29 高性能液体石膏板产品 配备紫外检测器的色谱仪 （HPLC/UV） 1.3 以国际单位制表示的数值应视为标准值。这些试验方法中不包括其他测量单位。 1.4 本试验方法的这些文本参考了提供解释材料的注释和脚注。这些注释和脚注（不包括表和图中的注释和脚注）不应视为本标准的要求。 1.5 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。

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 (S 8 ) in 26 Ggypsum Panel Products—General Provisions Determination of Orthorhombic Cyclooctasulfur (S 8 ) in 27 Gypsum Panel Products by Gas Chromatograph Equipped with a Mass Spectrometer (GS/MS) Determination of Orthorhombic Cyclooctasulfur (S 8 ) in 28 Gypsum Panel Products by Gas Chromatograph Equipped with an Electron Capture Detector (GC/ECD) Determination of Orthorhombic Cyclooctasulfur (S 8 ) 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.