1.1 本指南涵盖了在工厂条件下使用经过培训的工厂人员识别或分离混合金属批次，或两者兼有。 1.2 鉴定不旨在具有在实验室中使用实验室设备在最佳条件下进行的程序的准确性和可靠性，并由受过培训的化学家或技术人员进行。识别的目的不是确定给定的金属件或批次是否符合规范。 1.3 根据本指南中提供的程序，某些金属组合的分离并不总是可能的，并且可能会出现错误。 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 4.1 本指南中描述的设备和程序是比较方法，用于识别或分离在某些制造操作中混合或失去特性的金属片或大量金属，或两者兼而有之。据推测，所有金属件或批次都已事先检查过，并符合适用规范。 4.2 本指南中描述的设备和程序也可能适用于识别或分离废金属，或两者兼而有之。

1.1 This guide covers the identification or segregation, or both, of mixed metal lots under plant conditions using trained plant personnel. 1.2 The identification is not intended to have the accuracy and reliability of procedures performed in a laboratory using laboratory equipment under optimum conditions, and performed by trained chemists or technicians. The identification is not intended to establish whether a given piece or lot of metal meets specifications. 1.3 Segregation of certain metal combinations is not always possible with procedures provided in this guide and can be subject to errors. 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. 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 ====== 4.1 Equipment and procedures described in this guide are comparative methods and are intended for identification or segregation, or both, of pieces or lots of metals that were mixed or lost their identity during certain manufacturing operations. It is presumed that all pieces or lots of metal have been previously checked and did meet applicable specifications. 4.2 The equipment and procedures described in this guide may also be suitable for identifying or segregating, or both, scrap metals.