1.1 本仪器测试方法包括测定游离水分、石膏（CaSO 4. •2小时 2. O） ，半水亚硫酸钙（CaSO 3. • 1. / 2. H2O）、氢氧化钙（Ca（OH） 2. )，碳酸钙（CaCO 3. )，以及使用宏观热重分析仪测定烟气脱硫固体中的灰分。 1.2 本仪器测试方法不适用于使用微克级样品的热重分析仪。 1.3 单位- 以国际单位制表示的数值应视为标准值。 国际单位制后括号中给出的值仅供参考，不被视为标准值。 1.4 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。 1.5 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。 ====意义和用途====== 5.1 游离水分 由该仪器测试方法确定，用于使用实际程序计算干基的其他分析结果 D3180 . 5.2 石膏 是用于评估工业用FGD固体质量的主要产品，尤其是建筑墙板。烟气脱硫固体还用于采矿、水泥制造和农业用途。 5.3 半水亚硫酸钙 用于评估某些烟气脱硫固体的工业适用性。

1.1 This instrumental test method covers the determination of free moisture, gypsum (CaSO 4 •2H 2 O), calcium sulfite hemihydrate (CaSO 3 • 1 / 2 H2O), calcium hydroxide (Ca(OH) 2 ), calcium carbonate (CaCO 3 ), and ash in flue gas desulfurization solids using a macro thermogravimetric analyzer. 1.2 This instrumental test method is not applicable to thermogravimetric analyzers using microgram size samples. 1.3 Units— The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. 1.4 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. 1.5 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. ====== Significance And Use ====== 5.1 Free Moisture , as determined by this instrumental test method, is used for calculating other analytical results to a dry basis using procedures in Practice D3180 . 5.2 Gypsum is the primary product used to assess the quality of the FGD-Solids for industrial purposes, especially construction wallboard. FGD solids are also used in mining applications, cement manufacturing, and for agricultural purposes. 5.3 Calcium Sulfite Hemihydrate is used to assess the suitability of some FGD-Solids for industrial uses.