1.1 本试验方法包括分析镁质、白云质和高钙石灰的总中和能力和溶解的主要氧化物。溶解的钙和镁是在试验条件下中和酸的主要物质。 1.2 选择试验条件来测量熟石灰中所含氢氧化钙和氢氧化镁的酸中和能力。通过将中和pH值控制在6，除了氢氧化钙部分外，还滴定氢氧化镁和氧化镁。 1.3 该试验方法还测定了在石灰烟气脱硫（FGD）条件下将溶解的石灰中存在的镁离子的分数。因为Mg 2+ 离子会改变烟气脱硫性能，了解其浓度很重要。 1.4 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 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。 ====意义和用途====== 5.1 现有的石灰基烟气脱硫装置正在运行，需要一种测量可用于吸收二氧化硫的氧化物的方法。溶解的氧化镁因石灰石来源和煅烧条件而异。

1.1 This test method covers analysis of magnesian, dolomitic and high-calcium limes for total neutralizing capability and dissolved major oxides. Dissolved calcium and magnesium are the major species that neutralize acid under the conditions of the test. 1.2 The test conditions are chosen to measure the acid-neutralizing capacity of both calcium hydroxide and magnesium hydroxide contained in slaked lime. By controlling the neutralization pH at 6, magnesium hydroxide and magnesium oxide are titrated in addition to calcium hydroxide fraction. 1.3 This test method also determines the fraction of Mg ions present in the lime that will dissolve under lime flue gas desulfurization (FGD) conditions. Because the Mg 2+ ion alters FGD performance, it is important to know its concentration. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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. ====== Significance And Use ====== 5.1 There are existing lime-based flue gas desulfurization units in operation that require a method to measure the oxides available for sulfur dioxide absorption. Dissolved magnesium oxide varies among limes depending on the limestone sources and calcination conditions.