EN ISO 665:2000

SLOVENSKI STANDARD
01-februar-2001
1DGRPHãþD
SIST EN ISO 665:1996
2OMQLFH'RORþHYDQMHYODJHLQKODSQLKVQRYL,62
Oilseeds - Determination of moisture and volatile matter content (ISO 665:2000)
Ölsamen - Bestimmung des Gehaltes an Feuchtigkeit und flüchtigen Bestandteilen (ISO
665:2000)
Graines oléagineuses - Détermination de la teneur en eau et en matieres volatiles (ISO
665:2000)
Ta slovenski standard je istoveten z: EN ISO 665:2000
ICS:
67.200.20 Oljnice Oilseeds
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL ISO
STANDARD 665
Second edition
2000-09-15
Corrected version
2002-04-01
Oilseeds — Determination of moisture and
volatile matter content
Graines oléagineuses — Détermination de la teneur en eau et en matières
volatiles
Reference number
ISO 665:2000(E)
©
ISO 2000
ISO 665:2000(E)
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ISO 665:2000(E)
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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
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.
Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 665 was prepared by Technical Committee ISO/TC 34, Food products, Subcommittee
SC 2, Oleaginous seeds and fruits.
This second edition cancels and replaces the first edition (ISO 665:1977), which has been technically revised.
Annex A of this International Standard is for information only.
This corrected version of ISO 665 :2000 incorporates a correction in the Foreword of the English version. The year
of publication of the first edition was given as 1997 instead of 1977.
INTERNATIONAL STANDARD ISO 665:2000(E)
Oilseeds — Determination of moisture and volatile matter content
1 Scope
This International Standard specifies a method for the determination of the moisture and volatile matter content of
oilseeds.
2 Normative reference
The following normative document contains provisions which, through reference in this text, constitute provisions of
this International Standard. For dated references, subsequent amendments to, or revisions of this publication do
not apply. However, parties to agreements based on this International Standard are encouraged to investigate the
possibility of applying the most recent edition of the normative document indicated below. For undated references,
the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of
currently valid International Standards.
ISO 664:1990, Oilseeds — Reduction of laboratory sample to test sample.
3 Term and definition
For the purposes of this International Standard, the following term and definition applies.
3.1
moisture and volatile matter content
loss in mass measured under the operating conditions specified in this International Standard
NOTE It is expressed as a mass fraction, in percent [formerly given as % (m/m)] of the mass of the initial sample.
4Principle
The moisture and volatile matter content of a test portion is determined, either on the material as received (pure
seed and impurities) or, if required, on the pure seed alone, by drying at 103 °C� 2 °C in an oven at atmospheric
pressure, until practically constant mass is reached.
5 Apparatus
Usual laboratory apparatus and, in particular, the following.
5.1 Analytical balance, capable of weighing to the nearest 0,001 g.
5.2 Mechanical mill, easy to clean, suitable for the kind of seed and allowing the latter to be ground without
heating and without appreciable change in moisture, volatile matter and oil content.
5.3 Mechanical grater or, if not available, a hand-operated grater.
ISO 665:2000(E)
5.4 Flat-bottomed vessel, either of metal or glass, at the discretion of the analyst.
If metal is used, it shall be resistant to attack under the test conditions. The vessel shall be provided with a well-
fitting lid and shall allow the test portion to be spread to about 0,2 g/cm (e.g. a vessel of diameter 70 mm and
height 30 mm to 40 mm). Glass vessels with ground closures may also be used.
5.5 Electric oven, with thermostatic control and good natural ventilation, capable of being regulated so that the
temperature of the air and of the shelves in the neighbourhood of the test portions lies between 101 °C and 105 °C
in normal operation.
5.6 Desiccator, containing an efficient desiccant such as phosphorus(V) oxide, silica gel, activated alumina,
etc., and provided with a ceramic plate which allows vessels (5.4) to cool rapidly.
6 Sampling
Sampling is not part of the method specified in this International Standard. A recommended sampling method is
giveninISO542�1�.
It is important that the laboratory receive a sample which is truly representative and has not been damaged or
changed during transport and storage.
7 Preparation of test sample
7.1 Prepare the test sample by reducing the laboratory sample in accordance with ISO 664. If large non-
oleaginous foreign bodies have been separated before reduction of the laboratory sample, make allowance for this
in the calculation (see 9.2). According to the requirements of the contract, take a sample as received or after
separation of the impurities.
7.2 In the case of copra, grate the product by hand or, preferably, use a mechanical grater (5.3) which allows the
whole sample to be treated. When grating by hand, which does not allow all the analysis sample to be grated,
endeavour to obtain a test sample which is as representative as possible and, to this end, take account of the size
and colour of different fragments.
The length of the particles after grating may exceed 2 mm, but shall not be greater than 5 mm. Mix the particles
carefully and carry out the determination without delay.
7.3 In the case of seeds of medium size (groundnut, etc.), except for safflower seed, sunflower seed, soya beans
and cottonseed with adherent linters, grind the test sample in the mechanical mill (5.2), which has previously been
well cleaned, until the major dimension of the particles obtained is not greater than 2 mm. Reject the first particles
(about one-twentieth of the sample). Collect the rest, mix carefully and carry out the determination without delay.
7.4 Small seeds (linseed, colza, hemp, etc.) as well as safflower seed, sunflower seed, soya beans and
cottonseed with adherent linters, are analysed without previous grinding.
8 Procedure
8.1 Test portion
8.1.1 Dry the vessel with its lid for 1 h at 103 °C prior to being placed in
...