ISO/R 1042:1969

Title missing - Legacy paper document

General Information

• Status: Withdrawn
• Publication Date: 31-Dec-1968
• Technical Committee: ISO/TMBG - Technical Management Board - groups
• Drafting Committee: ISO/TMBG - Technical Management Board - groups
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 01-Jan-1974

Standards Content (Sample)

UDC 542.231 Ref. No. : ISO/R 1042-1969 (E)
IS0
FOR STA N DARD I Z AT I O N
I N TERN AT1 ON A L ORGANIZATION
IS0 RECOMMENDATION
R 1042
ONE-MARK VOLUMETRIC FLASKS
1st EDITION
April 1969
COPYRIGHT RESERVED
The copyright of IS0 Recommendations and IS0 Standards
belongs to IS0 Member Bodies. Reproduction of these
documents, in any country, may be authorized therefore only
by the national standards organization of that country, being
a member of ISO.
For each individual country the only valid standard is the national standard of that country.
Printed in Switzerland
Also issued in French and Russian.
Copies to be obtained through the national standards organizations.

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BRIEF HISTORY
The IS0 Recommendation R 1042, One-mark volumetricflasks, was drawn up by Technical
Committee ISO/TC 48, Laboratory glassware and related apparatus, the Secretariat of which is
held by the British Standards Institution (BSI).
Work on this question led to the adoption of a Draft IS0 Recommendation.
In December 1963, this Draft IS0 Recommendation (No. 697) was circulated to all the IS0
Member Bodies for enquiry. It was approved, subject to a few modifications of an editorial
nature, by the following Member Bodies:
Argentina Greece Spain
Switzerland
Australia Hungary
Austria India Turkey
Belgium Israel U.A.R.
Brazil Italy United Kingdom
Canada Japan U.S.A.
Chile Korea, Rep. of U.S.S.R.
Colombia Netherlands Yugoslavia
Czechoslovakia New Zealand
France Poland
No Member Body opposed the approval of the Draft.
The Draft IS0 Recommendation was then submitted by correspondence to the IS0 Council,
which decided, in April 1969, to accept it as an IS0 RECOMMENDATION.
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ISO/R 1042-1969 (E)
~~~~~~
IS0 Recommendation R 1042 April 1969
ONE-MARK VOLUMETRIC FLASKS
1. SCOPE
This IS0 Recommendation specifies requirements for an internationally acceptable series of
one-mark volumetric flasks, suitable for general laboratory purposes.
The details specified are in conformity with IS0 Recommendation R 384, Principles of construc-
tion and adjustment of volumetric glassware.
2. BASIS OF ADJUSTMENT
2.1 Unit of volume
L
The unit of volume should be the cubic centimetre (cm3), for which the name millilitre (mi)
may be used.
NOTE. - The term millilitre (mi) is commonly used as a special name for the cubic centimetre (cmS), in
accordance with a decision of the twelfth Conférence Générale des Poids et Mesures. The term millilitre
is acceptable, in general, for references in IS0 Recommendations to capacities of volumetric glassware and
it is used, in particular, in the present text.
2.2 Reference temperature
The standard reference temperature, i.e. the temperature at which the volumetric flask is
intended to contain its nominal volume (nominal capacity), should be 20 "C.
NOTE. - When the flask is required for use in a country which has adopted a standard reference temper-
ature of 27O C, this value should be substituted for ZOO C.
3. CLASSES OF ACCURACY
Two classes of accuracy are specified:
for the higher grade,
Class A
Class B for the lower grade.
4. SERIES OF CAPACITIES
The series of capacities of one-mark volumetric flasks is as follows:
5, 10,25, 50, 100,200,250, 500, 1000 and 2000 ml.
All these flasks may be finished with a plain neck or be provided with a stopper.
NOTE. - If volumetric flasks are required of capacities other than those listed above, it is recommended that they
should conform, as far as possible, to the essential requirements of this IS0 Recommendation.
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ISO/R 1042-1989 (E)
5. DEFINITION OF CAPACITY
The capacity of a volumetric flask is defined as the volume of water at 20 OC, expressed in
millilitres, contained by the flask at 20 OC, when filled to the graduation line.
NOTE. - Where, exceptionally, the reference temperature is 27 OC, this value should be substituted for 20 OC.
Setting the meniscus should be performed by one of the two methods detailed below:
(a) The meniscus is set so that the plane of the top edge of the graduation line is horizontally
tangential to the lowest point of the meniscus, the line of sight being in the same plane.
(b) The meniscus is set so that the plane of the centre of the graduation line is horizontally
tangential to the lowest point of the meniscus. The eye is raised towards the plane and
observes the front and back portions of the line apparently meeting the lowest point of the
meniscus simultaneously.
6. ACCURACY
The capacity of the flask should not differ from the nominal capacity by more than the maximum
I
permitted errors shown in Table 1.
TABLE 1 - Maximum permitted errors on capacity
Values in millilitres
Maximum permitted errors
Nominal
capacity
Class A Class B
5 f0.025 f0.05
10 f0.025 f0.05
25 f0.04 60.08
50.12
50 f0.06
100 fO.10 f o. 20
200 f0.15 f O. 30
f0.30
250 f0.15
500 f0.25 f0.50
1 O00 f0.40 i-0.80
2000 f0.60 k1.20
7. CONSTRUCTION
7.1 Material
Volumetric flasks should be constructed of glass of suitable chemical and thermal properties,
should be as free as possible from visible de
...