1.1 本试验方法包括测定浓度范围为1的保护渣中的总碳 % 至25 %. 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 本试验方法已根据实践进行评估 E1601 和指南 E1763 . 除非精度和偏差部分另有说明，否则每种方法范围内的下限规定了可在可接受误差（定义为标称值5）下分析的最低分析物含量 % 获得50分的风险 % 或两个实验室中相同测试样品结果的较大相对差异）。 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和健康实践，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 本试验方法用于测定保护渣中的总碳，主要用于测试此类材料是否符合成分规范。假设所有使用该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中进行，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 This test method covers the determination of total carbon in mold powders in the concentration range from 1 % to 25 %. 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 test method has been evaluated in accordance with Practice E1601 and Guide E1763 . Unless otherwise noted in the precision and bias section, the lower limit in the scope of each method specifies the lowest analyte content that may be analyzed with acceptable error (defined as a nominal 5 % risk of obtaining a 50 % or larger relative difference in results on the same test sample in two laboratories). 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 and health 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 This test method for the determination of total carbon in mold powders is primarily intended to test such materials for compliance with compositional specifications. It is assumed that all who use this test method will be trained analysts capable of performing common laboratory procedures skillfully and safely. It is expected that the 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 .