EN ISO 4787:2021
(Main)Laboratory glass and plastic ware - Volumetric instruments - Methods for testing of capacity and for use (ISO 4787:2021)
Laboratory glass and plastic ware - Volumetric instruments - Methods for testing of capacity and for use (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 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.
Laborgeräte aus Glas und Kunststoff - Volumenmessgeräte - Prüfverfahren und Anwendung (ISO 4787:2021)
Dieses Dokument legt Verfahren für die Prüfung, Kalibrierung und Anwendung von Volumenmessgeräten aus Glas und Kunststoff fest, um eine größtmögliche Genauigkeit bei der Anwendung zu erhalten.
ANMERKUNG Als Prüfung wird der Vorgang bezeichnet, anhand dessen die Konformität des einzelnen Volumenmessgeräts mit der zutreffenden Norm untersucht wird; mit dem Ziel, eine Messabweichung an einem oder mehreren Punkten zu ermitteln.
Dieses Dokument gilt für Volumenmessgeräte mit Nennvolumen im Bereich von 100 µl bis 10 000 ml. Sie gelten für Vollpipetten (siehe ISO 648), für Messpipetten (siehe ISO 835), für Büretten (siehe ISO 385), für Messkolben (siehe ISO 1042 und ISO 5215) und für Messzylinder (siehe ISO 4788 und ISO 6706).
Die Verfahren sind nicht für die Prüfung von Volumenmessgeräten mit Nennvolumen von weniger als 100 µl vorgesehen, z. B. für Mikroglasgeräte.
Dieses Dokument behandelt nicht ausdrücklich Pyknometer nach ISO 3507. Jedoch können die hier festgelegten Verfahren für die Volumenbestimmung zum größten Teil auch für die Volumenbestimmung von Pyknometern angewendet werden. Bei einigen Typen von Pyknometern kann eine besondere Handhabung erforderlich sein.
Verrerie et matériel en plastique de laboratoire - Instruments volumétriques - Méthodes d'essai de la capacité et d'utilisation (ISO 4787:2021)
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.
Laboratorijska oprema iz stekla in plastike - Instrumenti za volumetrična merjenja - Metode za preskušanje zmogljivosti in uporaba (ISO 4787:2021)
Ta dokument podaja metode za preskušanje, umerjanje in uporabo instrumentov za volumetrična merjenja, izdelanih iz stekla in plastike, da se doseže največja natančnost pri uporabi.
OPOMBA: Preskušanje je postopek, s katerim se ugotavlja skladnost posameznega instrumenta za volumetrično merjenje z ustreznim standardom, pri čemer se določi njegova napaka pri merjenju na eni ali več točkah.
Ta dokument se uporablja za instrumente za volumetrična merjenja z nominalno kapaciteto od 100 µl do 10.000 ml. Sem spadajo pipete z eno oznako volumna (glej standard ISO 648), graduirane pipete (glej standard ISO 835), birete (glej standard ISO 385), volumetrijske steklenice (glej standarda ISO 1042 in ISO 5215) in graduirani merilni valji (glej standarda ISO 4788 in ISO 6706).
Metode niso namenjene za preskušanje instrumentov za volumetrična merjenja s kapaciteto manj kot 100 µl, kot je mikro steklovina.
Ta dokument ne obravnava posebej piknometrov, kot so opredeljeni v standardu ISO 3507. Vendar postopke za določanje prostornine steklovine je mogoče v večini uporabiti tudi za določanje prostornine piknometra. Pri nekaterih vrstah piknometrov je morda potrebno posebno ravnanje.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2022
Nadomešča:
SIST EN ISO 4787:2011
Laboratorijska oprema iz stekla in plastike - Instrumenti za volumetrična merjenja -
Metode za preskušanje zmogljivosti in uporaba (ISO 4787:2021)
Laboratory glass and plastic ware - Volumetric instruments - Methods for testing of
capacity and for use (ISO 4787:2021)
Laborgeräte aus Glas und Kunststoff - Volumenmessgeräte - Prüfverfahren und
Anwendung (ISO 4787:2021)
Verrerie et matériel en plastique de laboratoire - Instruments volumétriques - Méthodes
d'essai de la capacité et d'utilisation (ISO 4787:2021)
Ta slovenski standard je istoveten z: EN ISO 4787:2021
ICS:
17.060 Merjenje prostornine, mase, Measurement of volume,
gostote, viskoznosti mass, density, viscosity
71.040.20 Laboratorijska posoda in Laboratory ware and related
aparati apparatus
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 4787
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2021
EUROPÄISCHE NORM
ICS 17.060 Supersedes EN ISO 4787:2011
English Version
Laboratory glass and plastic ware - Volumetric
instruments - Methods for testing of capacity and for use
(ISO 4787:2021)
Verrerie et matériel en plastique de laboratoire - Laborgeräte aus Glas und Kunststoff -
Instruments volumétriques - Méthodes d'essai de la Volumenmessgeräte - Prüfverfahren und Anwendung
capacité et d'utilisation (ISO 4787:2021) (ISO 4787:2021)
This European Standard was approved by CEN on 20 November 2021.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4787:2021 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 4787:2021) has been prepared by Technical Committee ISO/TC 48 "Laboratory
equipment" in collaboration with Technical Committee CEN/TC 332 “Laboratory equipment” the
secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by June 2022, and conflicting national standards shall be
withdrawn at the latest by June 2022.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 4787:2011.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 4787:2021 has been approved by CEN as EN ISO 4787:2021 without any modification.
INTERNATIONAL ISO
STANDARD 4787
Third edition
2021-11
Laboratory glass and plastic ware —
Volumetric instruments — Methods
for testing of capacity and for use
Verrerie et matériel en plastique de laboratoire — Instruments
volumétriques — Méthodes d'essai de la capacité et d'utilisation
Reference number
ISO 4787:2021(E)
ISO 4787:2021(E)
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
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Published in Switzerland
ii
ISO 4787:2021(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Principle . 2
5 Volume and reference temperature . 2
5.1 Unit of volume . 2
5.2 Reference temperature . 2
6 Apparatus and calibration liquid . 2
6.1 Balance . 2
6.2 Measurement devices . 2
6.3 Calibration liquid . 3
6.4 Receiving vessel . 3
7 Factors affecting the accuracy of volumetric instruments . 3
7.1 General . 3
7.2 Temperature . 3
7.2.1 Temperature of the volumetric instrument . 3
7.2.2 Temperature of calibration liquid . 3
7.3 Cleanliness of surface . 4
7.4 Conditions of used volumetric instruments . 4
7.5 Delivery time and waiting time . 4
8 Setting the meniscus . 5
8.1 General . 5
8.2 Setting the meniscus . 5
8.2.1 Meniscus of transparent liquids . 5
8.2.2 Meniscus of opaque liquids . 7
9 Calibration procedure . 7
9.1 General . 7
9.2 Test room . 7
9.3 Filling and delivery . 7
9.3.1 Volumetric flasks and measuring cylinders . 7
9.3.2 Pipettes adjusted to deliver . 7
9.3.3 Pipettes adjusted to contain . 8
9.3.4 Burettes adjusted to deliver . 8
9.3.5 Pycnometers . . 9
9.4 Weighing . 9
9.5 Volume and uncertainty calculation . 9
10 Procedure for use .10
10.1 General . 10
10.2 Volumetric flasks (in accordance with ISO 1042 or ISO 5215) . 11
10.3 Measuring cylinders (in accordance with ISO 4788 or ISO 6706) . 11
10.4 Burettes (in accordance with ISO 385) . 11
10.5 Pipettes .
...
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