ISO 4787:2021

This document provides methods for the testing, calibration and use of volumetric instruments made from glass and plastic in order to obtain the best accuracy in use.

NOTE Testing is the process by which the conformity of the individual volumetric instrument with the appropriate standard is determined, resulting in the determination of its error of measurement at one or more points.

This document is applicable to volumetric instruments with nominal capacities in the range of 100µl to 10000ml. These include single-volume pipettes (see ISO648), graduated pipettes (see ISO835), burettes (see ISO385), volumetric flasks (see ISO1042 and ISO5215), and graduated measuring cylinders (see ISO4788 and ISO6706).

The methods are not intended for testing of volumetric instruments with capacities below 100µl such as micro-glassware.

This document does not deal specifically with pycnometers as specified in ISO3507. However, the procedures specified for the determination of volume of glassware can, for the most part, also be followed for the determination of a pycnometer volume. For some types of pycnometers, special handling can be necessary.