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Ref. No.: ISOIR 542 - 1967 (E)
UDC 665.3
IS0
I N T E R NAT1 O NAL ORGAN I ZATl O N FOR STANDARD I ZATl ON
IS0 RECOMMENDATION
R 542
OILSEEDS - SAMPLING
1st EDITION
January 1967
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 542, Oilseeds - Sampling, was drawn up by Technical
Committee ISO/TC 34, Agricultural Food Products, the Secretariat of which is held by the Office
Hongrois de Normalisation (MSZH).
Work on this question by the Technical Committee began in 1960 and led, in 1963, to the
adoption of a Draft IS0 Recommendation.
In March 1964, this Draft IS0 Recommendation (No. 685) 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 :
Australia Hungary Romania
Canada
Ireland Sweden
Chile
Korea, Rep. of Switzerland
Colombia
Netherlands Turkey
Czechoslovakia Portugal U.A.R.
France Republic United Kingdom
Germany of South Africa U.S.S.R.
Two Member Bodies opposed the approval of the Draft:
Austria
India
The Draft IS0 Recommendation was then submitted by correspondence to the IS0
Council, which decided, in January 1967, to accept it as an IS0 RECOMMENDATION.
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ISOlR 542 - 1967 (E)
IS0 Recommendation R 542 January 1967
OILSEEDS - SAMPLING
FOREWORD
Correct sampling is a difficult process which requires most careful attention. Emphasis cannot
therefore be too strongly laid on the necessity of obtaining a properly representative sample of
oilseeds for analysis.
Most oilseeds are sold on the basis of a sample and on the result of an analysis of the
sample, and disputes are invariably settled by reference to the sample, so that careless or inaccurate
sampling will lead to misunderstanding, delay and unnecessary financial adjustments.
The procedures given in this IS0 Recommendation are recognized as good practice and it is
strongly recommended that they be followed whenever practicable. It is recognized that it is
difficult to lay down fixed rules to be followed in every case, and particular circumstances may
render some modification of the method desirable.
1. SCOPE
This IS0 Recommendation describes methods for sampling consignments of oilseeds. It also
describes apparatus in use for this purpose.
2. GENERAL
2.1 The purpose of this IS0 Recommendation is to specify general conditions relating to sampling
for the assessment of the quality of oilseeds purchased as industrial raw materials. Total
consignments should be considered in lots of not more than 500 t * for large and medium-
sized seeds and not more than 100 t for small seeds.
2.2 Samples should be fully representative of the lots from which they are drawn. For this
purpose, starting from a lot limited to a maximum of 500 t (or 100 t, as appropriate), a
number of primary samples should be drawn and carefully mixed, thus giving a bulk sample
from which is obtained, by successive divisions, the contract sample for analysis.
2.3 Special care is necessary to ensure that all sampling apparatus is clean, dry and free from
foreign odours.
Sampling should be carried out in such a manner as to protect the samples of oilseeds, the
sampling apparatus and the containers in which the samples are placed from adventitious
contamination such as rain, dust, etc.
Material adhering to the outside of the sampling apparatus should be removed before the
contents are discharged.
* Metric tonnes. 1 t = loo0 kg
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ISOlR 542 - 1967 (E)
3. DEFINITIONS
Terms relating to the lot and to the samples have the following definitions:
3.1 Consignment
The quantity of seed dispatched at one time and covered by a particular contract.
3.2 Lût
A stated proportion of the consignment which will allow the quality to be assessed.
3.3 Primary sample
A small quantity of seed taken from a single position in the lot.
A series of primary samples should be drawn, from different positions in the lot, which when
bulked and mixed will be representative of the lot.
3.4 Bulk sample
The quantity of seed formed by combining and blending the primary samples.
3.5 Contract sample
A small sample representing the quality of the lot, obtained from the bulk sample and
intended for analysis or other examination.
4. APPARATUS
The apparatus required falls under the following headings; examples are given under each heading
(see also Figures 1 to 9 in Annex A, pages 10 and 11):
4.1 Sampling from bags
Sack-type spears or triers, cylindrical samplers, conical samplers and hand-scoops.
4.2 Sampling from bulk
Shovels, hand-scoops, cylindrical samplers, conical samplers, mechanical samplers and other
apparatus for drawing small periodical samples from a flow of oilseeds.
4.3 Mixing and dividing
Shovels, quartering irons, riffles and other dividing apparatus.
5. LIMITATION OF THE SIZE OF LOT
5.1 Transport by ship
Most of the oilseeds are received from ocean-going vessels or from river transport. In both
cases sampling normally takes place at transfer from the vessel. Each lot should be 500
(or 100) t or part thereof.
5.2 Transport by road or rail
In the case of transfer from vessel to road or rail wagons, sampling may take place prior
to the loading of the wagons. Each lot should be 500 (or 100) t or part thereof.
If sampling is carried out from laden wagons, each lot should comprise a number of wagons
containing a total of 500 (or 100) t or part thereof.
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ISOlR 542 - 1967 (E)
5.3 Silo or warehouse
Where seed is unloaded direct to silos or warehouses from a vessel the samples should be
drawn as in clause 5.1. Where there is no provision for such sampling, this may take place
as in clause 5.2 prior to, or during, transfer to silo or warehouse. Each lot should be 500
(or 100) t
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