ISO 542:1980
(Main)Oilseeds — Sampling
Oilseeds — Sampling
Graines oléagineuses — Échantillonnage
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Standards Content (Sample)
International Standard
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INTERNATIONAL ORGANIZATION FOR STANDARDIZATION*MEWYHAPOllHAR OPTAHHBAUWR ii0 CTAHJ~APTH~AUHM.ORGANISATION INTERNATIONALE DE NORMALISATION
Oilseeds - Sampling
Graines oléagineuses - Échantillonnage
First edition - 1980-03-01
1 UDC 633.85 : 665.3 : 620.11 Ref. No. IS0 542-1980 (E)
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Descriptors : agricultural products, oilseeds, quality control, sampling, sampling equipment, packages.
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Price based on 6 pages
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Foreword
IS0 (the international Organization for Standardization) is a worldwide federation of
national standards institutes (IS0 member bodies). The work of developing Inter-
national Standards is carried out through IS0 technical committees. Every member
body interested in a subject for which a technical committee has been set up has the
right to be represented on that committee. International organizations, governmental
and non-governmental, in liaison with ISO, also take part in the work.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the IS0 Council.
International Standard IS0 542 was developed by Technical Committee IÇO/TC 34,
Agricultural food products.
It was submitted directly to the IS0 Council, in accordance with clause 5.10.1 of Part 1
of the Directives for the technical work of ISO. It cancels and replaces IS0 Recommen-
R 542-1967, which had been approved by the member bodies of the following
dation
countries :
Australia Germany, F. R. South Africa, Rep. of
Canada Hungary Sweden
Chile Ireland Switzerland
Colombia Korea, Rep. of Turkey
Czechoslovakia Netherlands United Kingdom
Egypt, Arab Rep. of Portugal USSR
France Romania
The member bodies of the following countries had expressed disapproval of the docu-
ment on technical grounds :
Austria
India
'Z International Organization for Standardization, 1980 O
Printed in Switzerland
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INTERNATIONAL STANDARD IS0 542-1980 (E)
Oilseeds - Sampling
O Introduction received at one time and covered by a particular contract or
shipping document. It may be composed of one or more lots.
Correct sampling is a difficult process which requires most
careful attention. Emphasis cannot therefore be too strongly
2.2 lot : A stated quantity, presumed to be of uniform
laid on the necessity of obtaining a properly representative
characteristics, taken from the consignment, and allowing the
sample of oilseeds for analysis.
quality to be assessed.
Most oilseeds are sold on the basis of a sample and on the
increment : A small quantity of oilseeds taken from a
2.3
result of analysis of the sample, and disputes are invariably set-
single position in the lot.
tled by reference to the sample, so that careless or inaccurate
sampling could lead to misunderstanding, delay and unwar-
A series of increments should be taken from different positions
ranted financial adjustments.
in the lot.
The procedures given in this International Standard are
recognized as good practice and it is strongly recornmended
2.4 bulk sample : The quantity of oilseeds obtained by com-
It is recognized
that they be followed whenever practicable.
bining and mixing the increments taken from a specific lot.
that it is difficult to lay down fixed rules to be followed in every
case, and particular circumstances may render some modifica-
2.5 laboratory sample : The quantity of oilseeds removed
tion of the method desirable.
from the bulk sample and intended for analysis or other ex-
amination.
The procedures described in this International Standard should
not be applied to products of manifestly heterogeneous com-
position.
3 General
3.1 Samples shall be taken jointly by sampling super-
intendents appointed by buyers and sellers, or by a sampling
1 Scope and field of application
superintendent appointed jointly.
This International Standard specifies general conditions
3.2 Samples shall be fully representative of the lots from
- relating to the sampling for the assessment of quality of
which they are taken. Therefore, as the composition of the lot
oilseeds purchased as industrial raw materials.
is seldom uniform, a sufficient number of increments shall be
taken and carefully mixed, thus giving a bulk sample from
which are obtained, by successive divisions, the laboratory
samples.
2 Definitions
3.3 It is essential that oilseeds which are sea-damaged or
For the purpose of this International Standard, the following
otherwise damaged in transit or out of condition, together with
definitions apply.
loose collected’) and sweepings, are kept separate from the
sound oilseeds and sampled separately. Samples of the un-
sound material shall not be mixed with samples of the sound
material.
2.1 consignment : The quantity of oilseeds dispatched or
This term is used to designate material which has leaked from its original container, but is not unduly contaminated.
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IS0 542-1980 (E)
Special care is necessary to ensure that all sampling 5.3 Carriage by rail or road
3.4
apparatus is clean, dry and free from foreign odours.
In the case of transfer from vessel to rail or road wagons,
sampling may take place prior to the loading of the wagons.
Sampling shall be carried out in such a manner as to protect the
Each lot should be 500 (or 100) t or part thereof.
samples, the sampling instruments, and the containers in
which the samples are placed, from adventitious contamination
If sampling is carried out from laden wagons, each lot should
such as rain, dust, etc.
comprise a number of wagons containing a total of 500 (or
t or part thereof.
Material adhering to the outside of the sampling apparatus shall 100)
be removed before the contents are discharged.
5.4 Silo or warehouse
4 Apparatus
Where seed is unloaded directly from a vessel into silos or
warehouses, the samples shall be taken as specified in 5.2.
Apparatus is required as follows (see figures 1 to 9 for ex-
Where there is no provision for such sampling, this may take
amples).
place as specified in 5.3 prior to, or during, transfer to the silo
or warehouse. Each lot shall be 500 (or 100) t or part thereof.
NOTE ~ Many different types and variations of apparatus are
available. The dimensions given in the figures are included, therefore,
solely as a guide.
4.1 Sampling from bulk 6 Method of taking samples
Shovels, hand-scoops, cylindrical samplers, conical samplers,
6.1 Taking of increments
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