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.