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IS0
I NT ERN AT I ON AL O R G A N IZAT I O N FOR STAND AR D I ZATl ON
IS0 RECOMMENDATION
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R 771
OILSEED RESIDUES
DETERMINATION OF MOISTURE AND VOLATILE MATTER
1st EDITION
July 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.
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BRIEF HISTORY
The IS0 Recommendation R 7 11, Oilseed residues, Determination of moisture and volatile
was drawn up by Technical Committee ISO/TC 34, Agricultural food products, the Secret-
matter,
ariat of which is held by the Magyar Szabvayügyi Hivatal (MSZH).
Work on this question by the Technical Committee began in 1963 and led, in 1965, to the
adoption of a Draft IS0 Recommendation.
in September 1966, this Draft IS0 Recommendation (No. 1018) was circulated to aU the IS0
Member Bodies for enquiry. It was approved, subject to a few modifications of an editorial nature, by
the following Member Bodies :
Argentina Hungary South Africa,
Australia India Rep. of
Brazil Iran Thailand
Bulgaria Israel Turkey
Chile Italy U.A.R.
Korea, Rep. of
Colombia United Kingdom
Czechoslovakia Netherlands U.S.S.R.
France Poland Yugoslavia
Germany Romania
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 July 1968, to accept it as an IS0 RECOMMENDATION.
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ISOlR 771-1968 (I
R 771 July 1968
IS0 Recommendation
OILSEED RESIDUES
DETERMINATION OF MOISTURE AND VOLATILE MATTER
1. SCOPE
This IS0 Recommendation describes a method for the determination of moisture and volatile matter
in residues (excluding compounded products) obtained by the extraction of oil from oilseeds by pres-
sure or solvent.
2. DEFINITION
By moisture and volatile motter is meant the loss in mass under the operating conditions described
below.
The content of moisture and volatile matter is expressed as a percentage by mass.
3. PRINCIPLE
Drying of the product at a temperature in the neighbourhood of 103 OC, in a constant temperature
oven at atmospheric pressure, to practically constant mass.
4. APPARATUS
4.1 Analytical balance.
Mechanical mill, easy to clean, allowing the residues to be ground without heating and without
4.2
appreciable change in the content of moisture, volatile matter and oil, to particles passing com-
pletely through a sieve of aperture of 1 mm in diameter.
4.3 Sieve, with aperture of 1 mm in diameter.
4.4 Vessel, of corrosion-resistant metal, with flat bottom, provided with a well fitting lid and aiiow-
ing the test portion to be spread at about 0.2 g per square centimetre (e.g. diameter of vessel 50
to 70 mm, height about 30 mm). Glass vessels with ground closures may also be used.
4.5 Electric oven, with temperature control, good natural ventilation and regulated so that in nor-
mai operation the temperature of the air and of the shelves carrying the samples is between 101
and 105 OC.
4.6 Desiccator, containing an efficient desiccant and provided with a metal plate for rapid cooling
of the vessel.
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ISO/R 771 -1968 (E
5. PROCEDURE
Carry out all weighings to the nearest 0.001 g.
5.1 Preparation of the sample
5.1.1 Use the contract sample obtained as described in IS0 Recommendation R .,* Oils
...