1.1 这些试验方法包括在30%浓度范围内测定铁矿石、精矿和团块中的总铁 % 至95 % 铁 1.2 本标准中的试验方法包含在以下章节中: 试验方法 A- 铁的硫化氢还原重铬酸盐滴定法（30 % 至75 % Fe） 试验方法 B- 氯化亚锡还原重铬酸盐滴定法测定铁（35 % 至95 % Fe） 试验方法 C- 铁的银还原重铬酸盐滴定法（35 % 至95 % Fe） 1.3 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。 1.4 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。 具体危害说明见第节 5. 以及这些试验方法中的特殊“警告”段落。 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====== 3.1 测定总铁含量是确定国际贸易中使用的铁矿石商业价值的主要手段。 3.2 这些试验方法旨在作为测定铁矿石中铁的参考方法。假设所有使用这些测试方法的人都是经过培训的分析员，能够熟练、安全地执行常见的实验室程序。预计工作将在配备适当的实验室进行，并遵循适当的废物处理程序。必须遵循适当的质量控制实践，如指南中所述 E882 .

1.1 These test methods cover the determination of total iron in iron ores, concentrates, and agglomerates in the concentration range 30 % to 95 % iron. 1.2 The test methods in this standard are contained in the sections indicated as follows: Test Method A— Iron by the Hydrogen Sulfide Reduction Dichromate Titration Method (30 % to 75 % Fe) Test Method B— Iron by the Stannous Chloride Reduction Dichromate Titration Method (35 % to 95 % Fe) Test Method C— Iron by the Silver Reduction Dichromate Titration Method (35 % to 95 % Fe) 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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. Specific hazards statements are given in Section 5 and in special “Warning” paragraphs throughout these test methods. 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 ====== 3.1 The determination of the total iron content is the primary means for establishing the commercial value of iron ores used in international trade. 3.2 These test methods are intended as referee methods for the determination of iron in iron ores. It is assumed that all who use these test methods will be trained analysts capable of performing common laboratory procedures skillfully and safely. It is expected that work will be performed in a properly equipped laboratory and that proper waste disposal procedures will be followed. Appropriate quality control practices must be followed, such as those described in Guide E882 .