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ISO 4787:2021

Laboratory glass and plastic ware — Volumetric instruments — Methods for testing of capacity and for use

Edition date: 2021-11-22
In Force
Available languages: English, French
Summary:

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 100 µl to 10 000 ml. These include single-volume pipettes (see ISO 648), graduated pipettes (see ISO 835), burettes (see ISO 385), volumetric flasks (see ISO 1042 and ISO 5215), and graduated measuring cylinders (see ISO 4788 and ISO 6706).

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

This document does not deal specifically with pycnometers as specified in ISO 3507. 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.



Le présent document fournit des méthodes d'essai, d'étalonnage et d'utilisation des instruments volumétriques en verre et en plastique, afin d'obtenir la meilleure exactitude possible lors de l'utilisation.

NOTE      L'essai est le procédé permettant d'établir la conformité de l'instrument volumétrique individuel à la norme appropriée; il se termine par la détermination de l'erreur de mesure de l'instrument en un ou plusieurs points.

Le présent document est applicable à des instruments volumétriques dont les capacités nominales sont comprises entre 100 µl et 10 000 ml. Sont concernées les pipettes à un volume (voir l'ISO 648), les pipettes graduées (voir l'ISO 835), les burettes (voir l'ISO 385), les fioles jaugées (voir l'ISO 1042 et l'ISO 5215) et les éprouvettes graduées cylindriques (voir l'ISO 4788 et l'ISO 6706).

Ces méthodes ne sont pas destinées à l'essai d'instruments volumétriques dont les capacités sont inférieures à 100 µl, comme par exemple la micro-verrerie.

Le présent document ne traite pas spécifiquement des pycnomètres, spécifiés dans l'ISO 3507. Toutefois, les modes opératoires spécifiés pour la détermination du volume de la verrerie peuvent également, en grande partie, être suivis pour la détermination du volume d’un pycnomètre. Certains types de pycnomètres peuvent nécessiter une manipulation spéciale.
ICS: 17.060-Measurement of volume, mass, density, viscosity
CTN: ISO/TC 48/SC 8 - 10389201

Standards Cancellations

Anula a ISO 4787:2010

International Equivalence

Identic UNE-EN ISO 4787:2021

Normas Conjuntas

Trabajo conjunto ISO/IEC 9594-2:2017

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