|
IS0
I N T ERN AT1 ON A L ORGAN 1Z AT1 O N FOR STAN D ARDlZ AT10 N
IS0 RECOMMENDATION
R 665
OLEAGINOUS SEEDS
DETERM NAT ON OF MOISTURE AND VOLATILE MATTER
1st EDITION
February 1968
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.
---------------------- Page: 1 ----------------------
BRIEF HISTORY
The IS0 Recommendation R 665, Oleaginous seeds - Determination of moisture and vola-
tile matter, was drawn up by Technical Committee ISOlTC 34, Agricultural food products, the
Secretariat of which is held by the Magyar Szabvanyügyi Hivatal (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 1966, this Draft IS0 Recommendation (No. 907) 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
Belgium India South Africa,
Bulgaria Iran Rep. of
Chile lreland Turkey
Colombia Italy U.A.R.
Czechoslovakia Netherlands United Kingdom
Finland New Zealand U.S.S.R.
France Norway Yugoslavia
Germany 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 February 1968, to accept it as an IS0 RECOMMENDATION.
-3-
---------------------- Page: 2 ----------------------
ISO/R 665 -1968 (E)
IS0 Recommendation
R 665 February 1968
OLEAGINOUS SEEDS
DETERMINATION OF MOISTURE AND VOLATILE MATTER
1. SCOPE
This IS0 Recommendation describes a method for the determination of moisture and volatile matter
in oilseeds.
2. DEFINITION
By moisture and volatile matter is meant the loss in mass under the experimental conditions specified
below.
3. PRINCIPLE
3.1 Determination of the moisture and volatile matter content of the material as received (pure
seed and impurities), by drying at a temperature close to 103 OC, in a temperature-controlled
oven at atmospheric pressure, until practically constant mass is reached.
3.2 If required, the moisture and volatile matter content of the pure seed alone may be determined.
4. APPARATUS
4.1 Analytical balance.
4.2 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.
Mechanical grater or, if not available, hand grater.
4.3
4.4 Vessel, of metal resistant to attack, with flat bottom, provided with a well fitting lid and
allowing the test sample to be spread to about 0.2 g/cmZ (e.g. diameter of vessel 70 mm, height
30 to 40 mm). Glass vessels with ground closures may also be used by agreement between buyer
and seller.
4.5 Temperature-controlled, electrically heated oven with good natural ventilation, regulated so
that the temperature of the air and of the shelves in the neighbourhood of the samples lies
between 101 and 105 "C in normal operation.
4.6 Desiccator containing an efficient desiccant such as phosphorus pentoxide, silica gel, activated
alumina, etc., and provided with a metal plate which allows the vessels to cool rapidly.
-5-
---------------------- Page: 3 ----------------------
lSO/R 665 -1968 (E)
5. PROCEDURE
5.1 Preparation of sample
5.1.1 Use a sample for analysis, obtained as described in IS0 Recommendation R 664, Oleaginous
seeds - Reduction of contract samples to samples for analysis. If large non-oleaginous
foreign bodies have been separated before the reduction of the laboratory sample, make
allowance for this in the calculation (see clause 6.3.1). According to the requirements of
the contract, use an analysis sample as received or after separation of the impurities.
5.1.2 For copra, grate the product by hand or, preferably, by use of a mechanical grater (4.3)
which allows the whole sample to be treated. With hand operation, which does not allow all
the analysis sample to be grated, endeavour to obtain a sub-sample which is as representative
as possible and, to this end, take accout of the size and colour of different fragments.
The length of the particles may exceed 2 mm, but should not be greater than 5 mm. Mix the
particles carefully and carry out the determination without delay.
5.1.3 For seeds of medium size (e.g. groundnut, soya, etc.), except sunflower seed and cottonseed
with adherent linters, grind the analysis sample in the mechanical mill (4.2) which has
previously been well cleaned, until the major dime
...