EN ISO 734-2:2000

Oilseed residues - Determination of oil content - Part 2: Rapid extraction method (ISO 734-2:1998)

Ölsamenrückstände - Bestimmung des Ölgehaltes - Teil 1: Extraktionsverfahren mit Hexan (oder Petrolether) (ISO 734-1:1998)

Dieser Teil von ISO 734 legt ein Extraktionsverfahren fest, das der Beurteilung der Wirksamkeit von Ölgewinnungsverfahren durch Vergleich des Ölgehaltes des Ölsamens mit dem Restölgehalt in den jeweiligen Extraktionsschroten, Pellets und Ölkuchen dient. Das Verfahren ist anwendbar auf Ölsamenrückstände, die durch Pressen oder durch Extraktion mit einem Lösungsmittel aus Ölsamen gewonnen wurden, sowie auf die daraus hergestellten Pellets.

Tourteaux de graines oléagineuses - Détermination de la teneur en huile - Partie 2: Méthode rapide par extraction (ISO 734-2:1998)

Ostanki tropin - Določevanje olja - 2. del: Metoda hitre ekstrakcije (ISO 734-2:1998)

General Information

• Status: Withdrawn
• Publication Date: 22-Aug-2000
• Withdrawal Date: 01-Jul-2008
• 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: 9960 - Withdrawal effective - Withdrawal
• Start Date: 02-Jul-2008
• Completion Date: 02-Jul-2008
• Ref Project: SIST EN ISO 734-2:2001 - Oilseed residues - Determination of oil content - Part 2: Rapid extraction method (ISO 734-2:1998)

Relations

• Replaced By: EN ISO 734-2:2008 - Oilseed meals - Determination of oil content - Part 2: Rapid extraction method (ISO 734-2:2008)
• Effective Date: 22-Dec-2008

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 734-2:2001
01-februar-2001
2VWDQNLWURSLQ'RORþHYDQMHROMDGHO0HWRGDKLWUHHNVWUDNFLMH,62
Oilseed residues - Determination of oil content - Part 2: Rapid extraction method (ISO
734-2:1998)
Ölsamenrückstände - Bestimmung des Ölgehaltes - Teil 1: Extraktionsverfahren mit
Hexan (oder Petrolether) (ISO 734-1:1998)
Tourteaux de graines oléagineuses - Détermination de la teneur en huile - Partie 2:
Méthode rapide par extraction (ISO 734-2:1998)
Ta slovenski standard je istoveten z: EN ISO 734-2:2000
ICS:
67.200.20 Oljnice Oilseeds
SIST EN ISO 734-2:2001 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 734-2:2001

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SIST EN ISO 734-2:2001

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SIST EN ISO 734-2:2001

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SIST EN ISO 734-2:2001
INTERNATIONAL ISO
STANDARD 734-2
First edition
1998-08-15
Oilseed residues — Determination of oil
content —
Part 2:
Rapid extraction method
Tourteaux de graines oléagineuses — Détermination de la teneur en
huile —
Partie 2: Méthode rapide par extraction
A
Reference number
ISO 734-2:1998(E)

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SIST EN ISO 734-2:2001
ISO 734-2:1998(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.
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.
International Standard ISO 734-1 was prepared by Technical Committee
ISO/TC 34, Agricultural food products, Subcommittee SC 2, Oleaginous
seeds and fruits.
This first edition of ISO 734-2, together with ISO 734-1, cancels and
replaces ISO 734:1979, which has been technically revised.
ISO 734 consists of the following parts, under the general title Oilseed
residues — Determination of oil content:
 Part 1: Extraction method with hexane (or light petroleum)
 Part 2: Rapid extraction method
Annexes A and B of this part of ISO 734 are for information only.
©  ISO 1998
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet [e-mail]
Printed in Switzerland
ii

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SIST EN ISO 734-2:2001
©
INTERNATIONAL STANDARD  ISO ISO 734-2:1998(E)
Oilseed residues — Determination of oil content —
Part 2:
Rapid extraction method
1  Scope
This part of ISO 734 specifies an extraction method which may be used to assess the efficiency of a de-oiling
process by comparing the oil content of the oilseed with the residual oil content of the corresponding extraction
meals, pellets and expeller cakes.
It is applicable to oilseed residues obtained from oilseeds by expelling or by extraction with a solvent, as well as to
the pellets made from the residues.
2  Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this part of
ISO 734. At the time of the publication, the editions indicated were valid. All standards are subject to revision, and
parties to agreements based on this part of ISO 734 are encouraged to investigate the possibility of applying the
most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid
International Standards.
ISO 771:1977, Oilseed residues — Determination of moisture and volatile matter content.
ISO 5502:1992, Oilseed residues — Preparation of test samples.
3  Definition
For the purposes of this part of ISO 734, the following definition applies.
3.1
oil content
whole of the substances extracted under the operating conditions specified in this part of ISO 734, and expressed
as a percentage by mass of the product as received
NOTE  On request the oil content may be expressed relative to dry matter.
4  Principle
Pulverization of the sample in a micro-ball mill in the presence of a solvent and subsequent extraction with the same
solvent in a suitable apparatus. Removal of the solvent from the extract by distillation, then weighing of the residue
after drying.
1

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SIST EN ISO 734-2:2001
©
ISO 734-2:1998(E) ISO
5  Reagents
Use only reagents of recognized analytical grade, unless otherwise specified.
5.1 Technical hexane, n-hexane or light petroleum, essentially composed of hydrocarbons with 6 carbon
atoms, of which less than 5 % distils below 50 °C and more than 95 % distils between 50 °C and 70 °C.
For either solvent, the residue on complete evaporation shall not exceed 2 mg per 100 ml.
NOTE  The solvent recovered from the extract by distillation should not be used for further determinations.
6  Apparatus
Usual laboratory apparatus and, in particular, the following.
6.1 Analytical balance, capable of weighing to an accuracy of + 0,001 g.
6.2 Drying oven, capable of being maintained at 103 °C + 2 °C.
1)
6.3 Micro-ball mill, of the Dangoumau type .
6.4 Grinding beaker, made of stainless steel or polytetrafluoroethylene, and of capacity 65 ml (see figure 1),
with stainless-steel balls.
The grinding beaker can (as depicted in figure 1) be surrounded by a cooling mantle through which water circulates
during grinding. When using grinding beakers made of polytetrafluoroethylene, cooling is obligatory.
6.5 Funnel, made of light-petroleum-resistant plastic, with a diameter of 70 mm, a stem external diameter of
10 mm and stem length of 100 mm to 150 mm.
The stem shall just reach into the extraction thimble on placing the funnel in the extraction apparatus as described
in 9.2.4. There is a fixed metal pin in the funnel to retain the stainless-steel balls (see figure 2).
2)
6.6 Continuous extraction apparatus, of the Twisselmann type with ground joints, consisting of a flat-
bottomed flask of 100 ml to 200 ml capacity, a connecting tube (extractor) to hold the extraction thimble, and a
reflux condensor (see figure 3).
NOTE  The use of other extractors is conditional upon the results of a test on a standard material of known oil content to
confirm the suitability of the apparatus.
6.7 Extraction thimbles, of dimensions 25 mm x 100 mm, with wall strength 1,5 mm and reinforced bottom part.
6.8 Water bath, electrically heated and explosion-proof.
6.9 Steam bath.
6.10 Cotton wool, fat-free.
NOTE  For example, defatted cotton wool for ophthalmic use.

1) The
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