1.1 本规程涵盖了测定矿石、精矿和相关冶金材料中汞的样品干燥步骤。 1.2 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。 1.3 本标准无意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。 1.4 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 本规程主要用于干燥样品以测定总汞。它不应用于测定样品含水量。大多数样品制备方法规定在105°C下干燥样品，直到获得恒定质量。水分含量确定为干燥时的质量损失百分比。由于汞及其某些化合物在105°C下易挥发，因此用于汞测定的样品应在60°C下干燥（见实施规程 E877 ，ISO 9599，ISO 12743和ISO 10251). 5.2 假设所有使用这种做法的人都是训练有素的分析员，能够熟练、安全地执行任务。预计工作将在适当的质量控制实践（如指南中所述）下，在配备适当的实验室中进行 E882 .

1.1 This practice covers the sample drying step for the determination of mercury in ores, concentrates, and related metallurgical materials. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 This standard does not purport to address all 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. 1.4 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 This practice is primarily to be used to dry samples for determination of total mercury. It should not be used for determination of sample moisture content. Most sample preparation methods prescribe drying samples at 105 °C, until a constant mass is obtained. The moisture content is determined as the percent mass loss on drying. Because mercury and some of its compounds are volatile at 105 °C, samples for mercury determination shall be dried at 60 °C (see Practice E877 , ISO 9599, ISO 12743, and ISO 10251). 5.2 It is assumed that all who use this practice will be trained analysts capable of performing skillfully and safely. It is expected that work will be performed in a properly equipped laboratory under appropriate quality control practices such as those described in Guide E882 .