1.1 本规范涵盖铸棒形式的精炼金( 注1 ). 1.1.1 99.5级- 最小纯度为995的黄金。 1.1.2 99.95级- 最小纯度为999.5的黄金。 1.1.3 99.99级- 最小纯度为999.9的黄金。 1.1.4 99.995级- 最小纯度为999.95的黄金。 注1: 本规范不排除其他形式的商业黄金。 1.2 以英寸-磅为单位的数值应视为标准值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.3 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熟悉所有危险，包括制造商提供的本产品/材料的适当安全数据表（SDS）中确定的危险，建立适当的安全、健康和环境实践，并在使用前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。

1.1 This specification covers refined gold in cast bar form ( Note 1 ). 1.1.1 Grade 99.5— Gold having a minimum fineness of 995. 1.1.2 Grade 99.95— Gold having a minimum fineness of 999.5. 1.1.3 Grade 99.99— Gold having a minimum fineness of 999.9. 1.1.4 Grade 99.995— Gold having a minimum fineness of 999.95. Note 1: Other forms of unfabricated gold of commerce are not to be excluded under this specification. 1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.3 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 become familiar with all hazards including those identified in the appropriate Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, 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.