prEN ISO 21294

• Abstract:

  This document specifies the requirements for manual sampling of oilseeds by manual means or by automated mechanical means, for the purpose of assessing their quality and condition.; Note An exemple of "condition" is an odour due to a treatment product.; Stockpiles are excluded of the scope of this document.

• Status: Not Published
• Publication Date: 30-Jan-2028
• ICS: 67.200.20 - Oilseeds
• Technical Committee: CEN/TC 307 - Oilseeds, vegetables and animal fats and oils and their by-products - Methods of sampling and analys
• Drafting Committee: CEN/TC 307 - Oilseeds, vegetables and animal fats and oils and their by-products - Methods of sampling and analys
• Current Stage: 4020 - Submission to enquiry - Enquiry
• Start Date: 06-Aug-2026
• Completion Date: 06-Aug-2026
• Ref Project: oSIST prEN ISO 21294:2026 - Oilseeds - Manual sampling of oilseeds (ISO/DIS 21294:2026)

• Revises: EN ISO 21294:2017 - Oilseeds - Manual or automatic discontinuous sampling (ISO 21294:2017)
• Effective Date: 20-Nov-2024

prEN ISO 21294 is the CEN draft standard for manual sampling of oilseeds, based on ISO/DIS 21294:2026. It specifies how to take representative samples of oilseeds, by manual means or automated mechanical means, so their quality and condition can be assessed. It is written for people who sample, receive, store, transport, test, or trade oilseeds and need samples that can stand up to comparison and dispute.

What does prEN ISO 21294 specify?

prEN ISO 21294 specifies the requirements for manual sampling of oilseeds and the handling of the resulting samples. It covers sampling for quality and condition assessment, with “condition” including cases such as an odour caused by a treatment product.

Stockpiles are outside the scope of prEN ISO 21294. The document is organized into clauses on scope, references, terms, principles, equipment, sampling time and place, sampling method, sample size, packing and labelling, dispatch, and the sampling report, followed by two informative annexes.

Annex	What it covers
Annex A	Steps for laboratory samples, from consignment to increments, composite sample, homogenization, division, and laboratory samples
Annex B	Instruments used to sample static products, with example figures

What are the key requirements of prEN ISO 21294?

prEN ISO 21294 requires sampling to produce representative laboratory samples from each lot. In practice, that means the sampling plan must reflect the lot structure, the transfer conditions, and the need to avoid bias or contamination.

Lot sizing and number of samples

Clause 4 and Clause 6 divide a consignment into lots, normally from 500 t up to 5 000 t depending on total mass, and require one laboratory sample per lot and one for any remainder. This matters because the lot structure controls how many samples must be taken and how they map to the shipment.

Taking increments

Clause 7 requires a sufficient number of increments from different parts of the lot, evenly distributed so the composite sample represents the whole lot. For bags, increments are taken from 2% of the bags, with a minimum of five bags. For bulk product, sampling during flow is preferred because it gives each part of the lot a better chance of being sampled.

Sampling in motion and static sampling

Clause 6 and Clause 7 prefer sampling during loading or unloading for ships, barges, wagons, lorries, silos, and warehouses. When the product is sampled in wagons, lorries, holds, or weigh hoppers, the document gives specific sampling points and methods so that layered or segregated material is not missed.

Equipment and cleanliness

Clause 5 requires clean, dry, odour-free equipment made of material that will not contaminate or alter the oilseeds. The clause groups tools for bags, bulk product, and mixing or reduction, so the sampler chooses equipment suited to the product and the container.

Composite sample reduction

Clause 7 requires increments to be combined, blended, and then reduced to laboratory samples by unbiased methods. It gives coning and quartering, cone-shaped dividers, rotary mechanical dividers, and riffle dividers, with emphasis on avoiding segregation and cross-contamination.

Packing, labelling, dispatch, and report

Clauses 9 to 11 require secure containers, moisture protection where needed, light protection for aflatoxin analysis, permanent labels, prompt dispatch, and a sampling report. The report must identify the lot, the condition of the oilseeds, visible infestation if present, and any deviations from the prescribed technique.

What terms does prEN ISO 21294 define?

Manual sampling is sampling by manual means or automated mechanical means at one or more positions within a lot.

Consignment is the quantity of oilseeds dispatched or received at one time under a contract or shipping document.

Lot is the stated quantity of a consignment that can be sampled to determine quality and condition.

Increment sample is the amount taken at one sampling point or one sampling time.

Composite sample is the combined sample made by blending increments from the lot.

Laboratory sample is the representative sample obtained by reducing a composite sample for laboratory analysis.

Homogenization means thorough blending so contaminants or foreign material are evenly distributed.

Bulk means product distributed in a large unpackaged quantity.

Who uses prEN ISO 21294?

prEN ISO 21294 is used by samplers, warehouse and silo operators, transport operators, traders, inspection bodies, and laboratories working with oilseeds. It is relevant during loading, unloading, storage entry or exit, and contract-based trade where sample quality affects acceptance, grading, and claims.

What changed in prEN ISO 21294 from the previous edition?

prEN ISO 21294 cancels and replaces ISO 21294:2017. The foreword states that this second edition is technically revised, and the main change is harmonisation of terminology with ISO 21295.

Which standards are used with prEN ISO 21294?

ISO 664, Oilseeds - Reduction of laboratory sample to test sample, is the only normative reference named in prEN ISO 21294. It supports the reduction step after a laboratory sample has been prepared.

What does the prEN ISO 21294 document contain?

prEN ISO 21294 contains a sampling framework, sampling rules, and practical procedures rather than test methods for oil quality itself. Table 1 sets lot sizes, minimum increment counts, and the number of laboratory samples, while Table 2 gives composite and laboratory sample sizes for copra, medium-size and large seeds, and small seeds.

The document also includes Figure 1 for wagon and lorry sampling points and Figure 2 for coning and quartering. Annex A shows the full sample preparation sequence for a laboratory, and Annex B illustrates example tools for static-product sampling.

SLOVENSKI STANDARD
01-oktober-2026
Oljnice - Ročno vzorčenje oljnic (ISO/DIS 21294:2026)
Oilseeds - Manual sampling of oilseeds (ISO/DIS 21294:2026)
Ölsaaten - Manuelle Probenahme von Ölsaaten (ISO/DIS 21294:2026)
Graines oléagineuses - Échantillonnage manuel des graines oléagineuses (ISO/DIS
21294:2026)
Ta slovenski standard je istoveten z: prEN ISO 21294
ICS:
67.200.20 Oljnice Oilseeds
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 21294
ISO/TC 34/SC 2
Oilseeds — Manual sampling of
Secretariat: AFNOR
oilseeds
Voting begins on:
Graines oléagineuses – Echantillonnage manuel des graines
2026-08-07
oléagineuses
Voting terminates on:
ICS: 67.200.20 2026-10-30
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 has not been edited by the ISO Central Secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 21294:2026(en)
DRAFT
ISO/DIS 21294:2026(en)
International
Standard
ISO/DIS 21294
ISO/TC 34/SC 2
Oilseeds — Manual sampling of
Secretariat: AFNOR
oilseeds
Voting begins on:
Graines oléagineuses – Echantillonnage manuel des graines
2026-08-07
oléagineuses
Voting terminates on:
ICS: 67.200.20 2026-10-30
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 has not been edited by the ISO Central 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
or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
ISO copyright office
RECIPIENTS OF THIS DRAFT ARE INVITED
CP 401 • Ch. de Blandonnet 8
TO SUBMIT, WITH THEIR COMMENTS,
CH-1214 Vernier, Geneva
NOTIFICATION OF ANY RELEVANT PATENT
Phone: [phone]
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 21294:2026(en)
ii
ISO/DIS 21294:2026(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principles . 2
4.1 Representative samples .2
4.2 Oilseeds sampling .2
5 Equipment and devices . 3
6 Time and place of sampling and limitation of the size of lots . 3
6.1 General information.3
6.2 Bulk transfer .3
6.2.1 General .3
6.2.2 Transfer to lorries and wagons .3
6.2.3 Transfer to barges .3
6.2.4 Transfer to silos or warehouses .4
6.3 Lot size: number of laboratory samples .4
7 Method for taking samples . 5
7.1 General information.5
7.2 Number of increments .5
7.2.1 General requirements on taking increments .5
7.2.2 Products in bags .5
7.2.3 Bulk .5
7.2.4 Aggregation of the composite sample .6
7.2.5 Division of the composite sample .6
7.2.6 Sample dividers .7
8 Sample size per lot and for dispatch to the laboratory . 8
9 Packing and labelling of samples . 8
9.1 Packing of samples .8
9.2 Labelling of samples .8
10 Dispatch of samples . 9
11 Sampling report . 9
Annex A (informative) Steps for laboratory samples . 10
Annex B (informative) Instruments used to sample static products .12

iii
ISO/DIS 21294:2026(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 non-governmental, 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.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 34, Food products, Subcommittee SC 2,
Oleaginous seeds and fruits and oilseed meals.
This second edition cancels and replaces the first edition (ISO 21294:2017), which has been technically
revised.
The main changes are as follows:
— Harmonisation of the terminology with ISO 21295.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

iv
ISO/DIS 21294:2026(en)
Introduction
Most oilseeds are marketed on the basis of the result of analysis of the samples representing lots, and
disputes are invariably settled by reference to these samples. Careless or inaccurate sampling practices
could lead to misunderstandings, delays and unwarranted financial adjustments.
Correct sampling is a difficult process and one that requires the most careful attention. Emphasis cannot
therefore be too strongly laid on the necessity of obtaining a representative sample of oilseeds for analysis.

v
DRAFT International Standard ISO/DIS 21294:2026(en)
Oilseeds — Manual sampling of oilseeds
1 Scope
This document specifies the requirements for manual sampling of oilseeds by manual means or by automated
mechanical means, for the purpose of assessing their quality and condition.
NOTE An example of “condition” is an odour due to a treatment product.
Stockpiles are excluded of the scope of this document.
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 664, Oilseeds — Reduction of laboratory sample to test sample
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https:// www .electropedia .org/
— ISO Online browsing platform: available at https:// www .iso .org/ obp
3.1
manual sampling
sampling by manual means or by automated mechanical means of at least one position within a lot (3.3).
EXAMPLE Hand-scoops, shovels, suitable sampling buckets, automatic suction probes, automatic samplers
(sequenced).
3.2
consignment
quantity of oilseeds dispatched or received at one time and covered by a particular contract or shipping
document
Note 1 to entry: The consignment can be composed of one or more lots or part of a lot.
3.3
lot
stated quantity of the consignment (3.2) which can be sampled in order to determine its quality and condition
Note 1 to entry: The quantity of the lot can be of a mass up to 5 000 t.
3.4
increment sample
quantity of material taken at one time at each individual sampling point (at each individual sampling time
for moving lot) throughout a lot (3.3)

ISO/DIS 21294:2026(en)
3.5
Composite sample
bulk sample
quantity of material representative of the consignment (3.2) or of the lot (3.3) obtained by combining
and blending the increments samples (3.4) of the same size taken from the lot (3.3) of oilseeds during its
transference.
3.6
Bulk
Product distributed in a large unpackaged quantity
Note 1 to entry: “bulk sample” is different of “bulk”.
3.7
homogenization
thorough blending by mechanical or manual means so that any contaminants or foreign materials are
thoroughly distributed throughout the bulk sample or laboratory sample (3.8)
3.8
laboratory sample
representative quantity of oilseeds obtained by unbiased reduction of a composite sample (3.5) using
appropriate methods to obtain a desired quantity intended for laboratory analysis. Analytical data from the
collected samples should be representative of the lot (3.3) as a whole.
4 Principles
4.1 Representative samples
The laboratory samples shall be as representative as possible of the lots from which they are taken. Each
consignment shall be divided, actually or notionally, into lots of 500 t to 5 000 t according to its size. At
least a minimum number of increments sample shall be taken from each lot and homogenized carefully in
order to obtain a composite sample from which laboratory samples may be taken by successive division. A
laboratory sample shall result from the sampling of each lot (see Table 1).
A diagram showing the different steps for laboratory samples is given in Annex A.
4.2 Oilseeds sampling
This document covers both the manual sampling of oilseeds in motion while being transferred and the
manual sampling and automated non-systematic mechanical sampling of static lots. Samples shall be taken
using manual or automatic methods. Where possible, sampling should be performed when the oilseeds are
flowing (e.g. during loading or unloading) so that the constituent parts of the lot have the same probability
of being sampled and comply with the minimum number and mass of in
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