NF EN ISO 4787

NF EN ISO 4787

May 2011
Standard Cancelled

Laboratory glassware - Volumetric instruments - Methods for testing of capacity and for use

ISO 4787:2010 provides methods for the testing, calibration and use of volumetric instruments made from glass in order to obtain the best accuracy in use. The International Standards for the individual volumetric instruments (ISO 385, ISO 646, ISO 835, ISO 1042 and ISO 4788) include clauses on the definition of capacity; these clauses describe the method of manipulation in sufficient detail to define the capacity without ambiguity. ISO 4787:2010 contains supplementary information. The procedures in ISO 4787:2010 are applicable to volumetric instruments with nominal capacities in the range of 0,1 ml to 10 000 ml. These include: single-volume pipettes (see ISO 648) without subdivisions; graduated measuring pipettes and dilution pipettes, with partial or complete subdivisions (see ISO 835); burettes (see ISO 385); volumetric flasks (see ISO 1042); and graduated measuring cylinders (see ISO 4788). The procedures are not recommended for testing of volumetric instruments with capacities below 0,1 ml such as micro-glassware. ISO 4787:2010 does not deal specifically with pyknometers 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 calibration of pyknometers.

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Main informations

Collections

National standards and national normative documents

Publication date

May 2011

Number of pages

27 p.

Reference

NF EN ISO 4787

ICS Codes

17.060   Measurement of volume, mass, density, viscosity
71.040.20   Laboratory ware and related apparatus

Classification index

B35-309

Print number

1 - 11/04/2011

International kinship

ISO 4787:2010

European kinship

EN ISO 4787:2011
Sumary
Laboratory glassware - Volumetric instruments - Methods for testing of capacity and for use

ISO 4787:2010 provides methods for the testing, calibration and use of volumetric instruments made from glass in order to obtain the best accuracy in use.

The International Standards for the individual volumetric instruments (ISO 385, ISO 646, ISO 835, ISO 1042 and ISO 4788) include clauses on the definition of capacity; these clauses describe the method of manipulation in sufficient detail to define the capacity without ambiguity. ISO 4787:2010 contains supplementary information.

The procedures in ISO 4787:2010 are applicable to volumetric instruments with nominal capacities in the range of 0,1 ml to 10 000 ml. These include: single-volume pipettes (see ISO 648) without subdivisions; graduated measuring pipettes and dilution pipettes, with partial or complete subdivisions (see ISO 835); burettes (see ISO 385); volumetric flasks (see ISO 1042); and graduated measuring cylinders (see ISO 4788). The procedures are not recommended for testing of volumetric instruments with capacities below 0,1 ml such as micro-glassware.

ISO 4787:2010 does not deal specifically with pyknometers 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 calibration of pyknometers.

Standard replaced by (1)
NF EN ISO 4787
December 2021
Standard Current
Laboratory glass and plastic ware - Volumetric instruments - Methods for testing of capacity and for use

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

Table of contents
View the extract
  • Avant-propos
    iv
  • 1 Domaine d'application
    1
  • 2 Références normatives
    1
  • 3 Termes et définitions
    2
  • 4 Résumé de la méthode
    2
  • 5 Volume et température de référence
    2
  • 5.1 Unité de volume
    2
  • 5.2 Température de référence
    2
  • 6 Équipement et liquide d'étalonnage
    2
  • 7 Facteurs influant sur l'exactitude des instruments volumétriques
    3
  • 7.1 Généralités
    3
  • 7.2 Température
    3
  • 7.3 Propreté de la surface du verre
    3
  • 7.4 Qualité des instruments volumétriques utilisés
    4
  • 7.5 Temps d'écoulement et temps d'attente
    4
  • 8 Ajustement du ménisque
    4
  • 8.1 Généralités
    4
  • 8.2 Ménisque des liquides transparents
    4
  • 8.3 Ménisque des liquides opaques
    5
  • 9 Mode opératoire d'étalonnage
    5
  • 9.1 Généralités
    5
  • 9.2 Salle d'essai
    6
  • 9.3 Remplissage et écoulement
    6
  • 9.4 Pesée
    7
  • 9.5 Évaluation
    7
  • 10 Utilisation
    8
  • 10.1 Généralités
    8
  • 10.2 Fioles jaugées (voir l'ISO 1042)
    8
  • 10.3 Éprouvettes graduées (voir l'ISO 4788)
    9
  • 10.4 Burettes (voir l'ISO 385)
    9
  • 10.5 Pipettes
    9
  • Annexe A (informative) Nettoyage de la verrerie volumétrique
    10
  • Annexe B (normative) Calcul du volume
    11
  • Bibliographie
    21
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