This specification covers the general requirements for the components that comprise the apparatus used for the weighing and drying operations in the laboratory practice of microchemical analysis. The components covered here are the following: combustion boats; weighing bottles, cup, and tubes; spatulas; forceps; tare flasks; metal cooling block; metal crucible container with glass cover; and micro glass desiccator with metal insert.

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