SIST EN ISO 8292:1998

Animal and vegetable fats and oils - Determination of solid fat content - Pulsed nuclear magnetic resonance method (ISO 8292:1991)

Tierische und pflanzliche Fette und Öle - Bestimmung des Festanteils von Fett - Verfahren mit gepulster magnetischer Kernresonanz (ISO 8292:1991)

Die vorliegende Internationale Norm legt ein Verfahren zur Bestimmung des Festanteils von tierischen unf pflanzlichen Fetten und Ölen fest (nachfolgend als Fette bezeichnet), das gepulste magnetische Kernresonanz mit niedriger Auflösung anwendet. Verschiedene thermische Vorbehandlungen werden in Abhängigkeit von der Polymorphie des Fettes festgelegt. Anmerkung 1: Beispiele für Fett mit einer deutlichen Polymorphie sind Kakaobutter und Fette, die merkliche Mengen von 2-ungesättigtem, 1, 3-gesättigtem Triacylglycerol enthalten.

Corps gras d'origines animale et végétale - Détermination de la teneur en corps gras solides - Méthode par résonance magnétique nucléaire pulsée (ISO 8292:1991)

Živalske in rastlinske maščobe in olja - Določevanje trdnih maščob - Metoda z uporabo pulzne jedrske magnetne resonance (ISO 8292:1991)

General Information

• Status: Withdrawn
• Publication Date: 31-Oct-1998
• Withdrawal Date: 07-Jun-2010
• ICS: 67.200.10 - Animal and vegetable fats and oils
• Technical Committee: KŽP - Agricultural food products
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 08-Jun-2010
• Due Date: 01-Jul-2010
• Completion Date: 08-Jun-2010
• Ref Project: EN ISO 8292:1995 - Animal and vegetable fats and oils - Determination of solid fat content - Pulsed nuclear magnetic resonance method (ISO 8292:1991)

Relations

• Replaced By: SIST EN ISO 8292-1:2010 - Animal and vegetable fats and oils - Determination of solid fat content by pulsed NMR - Part 1: Direct method (ISO 8292-1:2008)
• Effective Date: 01-Sep-2010
• Replaced By: SIST EN ISO 8292-2:2010 - Animal and vegetable fats and oils - Determination of solid fat content by pulsed NMR - Part 2: Indirect method (ISO 8292-2:2008)
• Effective Date: 01-Sep-2010
• Replaced By: SIST EN ISO 8292-2:2010 - Animal and vegetable fats and oils - Determination of solid fat content by pulsed NMR - Part 2: Indirect method (ISO 8292-2:2008)
• Effective Date: 08-Jun-2022
• Replaced By: SIST EN ISO 8292-1:2010 - Animal and vegetable fats and oils - Determination of solid fat content by pulsed NMR - Part 1: Direct method (ISO 8292-1:2008)
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 8292:1998
01-november-1998
äLYDOVNHLQUDVWOLQVNHPDãþREHLQROMD'RORþHYDQMHWUGQLKPDãþRE0HWRGD]
XSRUDERSXO]QHMHGUVNHPDJQHWQHUHVRQDQFH,62
Animal and vegetable fats and oils - Determination of solid fat content - Pulsed nuclear
magnetic resonance method (ISO 8292:1991)
Tierische und pflanzliche Fette und Öle - Bestimmung des Festanteils von Fett -
Verfahren mit gepulster magnetischer Kernresonanz (ISO 8292:1991)
Corps gras d'origines animale et végétale - Détermination de la teneur en corps gras
solides - Méthode par résonance magnétique nucléaire pulsée (ISO 8292:1991)
Ta slovenski standard je istoveten z: EN ISO 8292:1995
ICS:
67.200.10 5DVWOLQVNHLQåLYDOVNH Animal and vegetable fats
PDãþREHLQROMD and oils
SIST EN ISO 8292:1998 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 8292:1998

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SIST EN ISO 8292:1998

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SIST EN ISO 8292:1998

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SIST EN ISO 8292:1998

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SIST EN ISO 8292:1998

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SIST EN ISO 8292:1998
INTERNATIONAL
STANDARD
first edition
1991-12-01
Animal and vegetable fats and oils -
Determination of solid fat content - Pulsed
nuclear magnetic resonance method
Corps gras d’origines animale et v&g&tale - Dgtermination de la teneur
en corps gras solides - Mkthode par rhonance magn&ique nucl6aire
puls4e
Reference number
IS0 8292:1991(E)

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SIST EN ISO 8292:1998
IS0 8292:1991(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work
of preparing International Standards is normally carried out through IS0
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, govern-
mental and non-governmental, in liaison with ISO, also take part in the
work. IS0 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 lnter-
national Standard requires approval by at least 75 % of the member
bodies casting a vote.
International Standard IS0 8292 was prepared by Technical Committee
ISO/TC 34, Agricultural food products, Sub-Committee SC 11, Animal and
vegetable fats and oh.
Annex A of this International Standard is for information only.
0 IS0 1991
All rights reserved. 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 Orga nization for Stand ardization
Case Postale 56 l CH-1211 Gen&ve 20 l Switzerl and
Printed in Switzerland
ii

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SIST EN ISO 8292:1998
IS0 8292:1991 (E)
INTERNATIONAL STANDARD
Animal and vegetable fats and oils - Determination of solid
fat content - Pulsed nuclear magnetic resonance method
4 Principle
1 Scope
This International Standard specifies a method for Preparation of test portions at specified tempera-
the determination of the solid fat content in animal
tures. Measurement of the magnetization decay
and vegetable fats and oils (hereinafter referred to
signals from the solid and liquid fat protons using
as fats) using low-resolution pulsed nuclear mag-
pulsed nuclear magnetic resonance, with automatic
netic resonance. Alternative thermal pretreatments calculation and display of the solid fat content.
are specified according to whether or not the fat
exhibits pronounced polymorphism.
NOTE 1 Examples of fat which exhibit pronounced
5 Material
polymorphism are cocoa butter and fats containing ap-
preciable quantities of 2unsaturated, 1,3-saturated
Calibration material, of known instrument response.
triacylglycerol.
NOTE 2 Calibration materials with known responses are
supplied by the instrument manufacturer. Materials giving
2 Normative reference
responses of 0 % (+z) and of about 35 % (I+) and
70 % (m/n2) are suitable. These response values are con-
The following standard contains provisions which,
stant for all measurement temperatures.
through reference in this text, constitute provisions
of this International Standard. At the time of publi-
cation, the edition indicated was valid. All standards
are subject to revision, and parties to agreements
6 Apparatus
based on this International Standard are encour-
aged to investigate the possibility of applying the
most recent edition of the standard indicated below.
Members of IEC and IS0 maintain registers of cur-
6.1 Measuring tubes, suitable for use with the nu-
rently valid International Standards. clear magnetic resonance instrument.
IS0 661:1989, Animal and vegetable fats and oils -
Preparation of test sample.
6.2 Metal blocks, preferably aluminium, with holes.
The diameter of the holes shall not be more than
0,4 mm greater than the average diameter of the
3 Definition
measuring tubes. The depth of the holes shall be
such that the level of the fat is approximately
For the purposes of this International Standard, the
10 mm below the upper surface of the block. The
following definition applies.
thickness of the metal under the holes and the dis-
tance between the edge of a peripheral hole and the
3.1 solid fat content: The percentage by mass of fat
nearest side face shall be 10 mm. The distance be-
in the solid state at a specified temperature when
tween the axes of two adjacent holes shall be
measured by pulsed nuclear magnetic resonance
7 mm greater than the diameter of the holes. One
under the conditions specified in this International
block is required for each water-bath used.
Standard.

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SIST EN ISO 8292:1998
IS0 8292:1991 (E)
6.3 Metal racks, of a depth such that the surface of
7 Sampling
the fat is 5 mm b
...