1.1 本规范涵盖微化学实验室实践中用于称重和干燥操作的设备。 1.2 以英寸-磅为单位的数值应视为标准值。公制等效值可能是近似值。 注1: 本规范最初由美国化学学会分析化学部微化学仪器委员会制定。 2. 1.3 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 apparatus used for weighing and drying operations in microchemical laboratory practice. 1.2 The values stated in inch-pound units are to be regarded as the standard. The metric equivalents may be approximate. Note 1: This specification was originally developed by the Committee on Microchemical Apparatus, Division of Analytical Chemistry, American Chemical Society. 2 1.3 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.