oSIST prEN ISO 1042:2026

SLOVENSKI STANDARD
01-junij-2026
Laboratorijska steklovina - Merilne bučke z eno oznako (ISO/DIS 1042:2026)
Laboratory glassware - One-mark volumetric flasks (ISO/DIS 1042:2026)
Laborgeräte aus Glas - Messkolben (ISO/DIS 1042:2026)
Verrerie de laboratoire - Fioles jaugées à un trait (ISO/DIS 1042:2026)
Ta slovenski standard je istoveten z: prEN ISO 1042
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.

DRAFT
International
Standard
ISO/DIS 1042
ISO/TC 48/SC 8
Laboratory glassware — One-mark
Secretariat: IPQ
volumetric flasks
Voting begins on:
Verrerie de laboratoire — Fioles jaugées à un trait
2026-04-02
Voting terminates on:
ICS: 17.060
2026-06-25
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
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NATIONAL REGULATIONS.
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NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 1042:2026(en)
DRAFT
ISO/DIS 1042:2026(en)
International
Standard
ISO/DIS 1042
ISO/TC 48/SC 8
Laboratory glassware — One-mark
Secretariat: IPQ
volumetric flasks
Voting begins on:
Verrerie de laboratoire — Fioles jaugées à un trait
ICS: 17.060 Voting terminates on:
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2026
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
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NATIONAL REGULATIONS.
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TO SUBMIT, WITH THEIR COMMENTS,
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Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 1042:2026(en)
ii
ISO/DIS 1042:2026(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Basis of adjustment . 1
4.1 Unit of volume .1
4.2 Reference temperature .2
5 Classes of accuracy . 2
6 Series of capacities. 2
7 Definition of capacity . 2
8 Accuracy . 2
9 Construction . 3
9.1 Material .3
9.2 Wall thickness .3
9.3 Shape .3
9.4 Neck .3
9.5 Stopper .3
9.6 Dimensions .3
9.6.1 Standard narrow-necked and wide-necked flasks .3
9.6.2 Rules for exceptional purposes .4
9.7 Graduation line .4
10 Marking and designation . 4
10.1 General .4
10.2 Identification number .4
11 Visibility of graduation line, figures and marking . 4
Annex A (normative) Shapes and dimensions of volumetric flasks . 6
Bibliography . 9

iii
ISO/DIS 1042:2026(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and nongovernmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are circulated to the member bodies for
voting. Publication as an International Standard requires approval by at least 75 % of the member bodies
casting a vote.
ISO 1042 was developed by Technical Committee ISO/TC 48, Laboratory glassware and related apparatus,
Subcommittee SC 8, Volume measuring instruments.
This fifth edition cancels and replaces the fourth edition (ISO 1042:1998) by incorporating the following
changes:
a) flasks with capacities of 150, 300, 3 000 and 10 000 ml have been added;
b) essential dimensions have been specified more detailed;
c) ground joint sizes have been modified;
d) rules for exceptional purposes have been introduced.

iv
ISO/DIS 1042:2026(en)
Introduction
Volumetric flasks together with analytical balances are the fundamental tools for the preparation of
volumetric standard solutions — the basis of chemical analysis. The design of narrow-necked class A
volumetric flasks has been optimized to achieve the fewest possible acceptable errors.
With the increasing popularity of piston-operated pipettors, there is market pressure for the manufacture of
volumetric flasks with wider necks so that pipettor tips may be inserted to remove solution directly. Wide-
necked flasks will of necessity be of lower accuracy than the corresponding capacities of narrow-necked
flasks and the insertion of any extraneous device may introduce other errors.
It is therefore recommended that narrow-necked class A volumetric flasks are used for the production of
standard solutions and where necessary, a suitable quantity should be poured into an intermediate vessel
into which the pipettor tip may be introduced.
In accordance with good laboratory practice, only narrow-necked class A volumetric flasks conforming to
this International Standard should be used for precise analytical purposes.

v
DRAFT International Standard ISO/DIS 1042:2026(en)
Laboratory glassware — One-mark volumetric flasks
1 Scope
This document specifies requirements for an internationally acceptable series of one-mark volumetric
flasks, suitable for general laboratory purposes.
The specifications in this document are in accordance with ISO 384 and with OIML Recommendation No. 4
[1]
.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO/IEC Guide 98-3, Uncertainty of measurement — Part 3: Guide to the
...