ISO 751:1998
(Main)Fruit and vegetable products — Determination of water-insoluble solids
Fruit and vegetable products — Determination of water-insoluble solids
Produits dérivés des fruits et légumes — Détermination du résidu sec insoluble dans l'eau
Sadni in zelenjavni proizvodi - Določevanje v vodi netopnih snovi
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 751
Second edition
1998-08-01
Fruit and vegetable products —
Determination of water-insoluble solids
Produits dérivés des fruits et légumes — Détermination du résidu sec
insoluble dans l’eau
A
Reference number
ISO 751:1998(E)
---------------------- Page: 1 ----------------------
ISO 751:1998(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 751 was prepared by Technical Committee ISO/TC 34, Agricultural food products,
Subcommittee SC 3, Fruit and vegetable products.
This second edition cancels and replaces the first edition (ISO 751:1981), which has been technically revised.
© 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 iso@iso.ch
Printed in Switzerland
ii
---------------------- Page: 2 ----------------------
INTERNATIONAL STANDARD © ISO ISO 751:1998(E)
Fruit and vegetable products — Determination of water-insoluble
solids
1 Scope
This International Standard specifies a method for the determination of the content of water-insoluble solids in the
edible parts of fruit and vegetable products.
2 Principle
The water-soluble matter in a test portion is dissolved in water, followed by filtration, drying of the residue and
weighing.
3 Apparatus
Usual laboratory apparatus and, in particular, the following.
3.1 Beakers, of capacity 250 ml or 400 ml.
3.2 Buchner funnel.
3.3 Filter paper, medium texture.
3.4 Indicator paper.
3.5 Weighing vessel.
3.6 Desiccator, containing an efficient desiccant.
3.7 Oven, capable of being maintained at 103 °C – 2 °C.
3.8 Centrifuge.
3.9 Analytical balance, capable of weighing to the nearest 0,001 g.
4 Sampling
It is important the laboratory receive a sample which is truly representative and has not been damaged or changed
during transport or storage.
Sampling is not part of the method specified in this International Standard. As there is no specific International
Standard dealing with fruit and vegetable products, it is recommended that the parties concerned come to an
agreement on the subject.
1
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© ISO
ISO 751:1998(E)
5 Preparation of test sample and of apparatus
5.1 Preparation of test sample
Separate and remove from the laboratory sample stalks, stones, hard seed-cavity walls and, whenever possible,
pips (after thawing in the case of frozen or deep-frozen products). Mix the sample thoroughly.
Allow frozen or deep-frozen products to thaw in a closed vessel and add the liquid formed during this process to the
product before mixing.
If it is desired to express the result in terms of the sample as received, weigh the latter before removing stalks,
stones, etc. Weigh these after washing and drying and take them into account in the expression of results (see 8.2).
5.2 Preparation of apparatus
Place a filter paper (3.3) in the weighing vessel (3.5) and dry in the oven (3.7) set at 103 °C for 30 min. Cool in the
desiccator (3.6) and weigh to the nearest 0,001 g.
6 Procedure
NOTE If it is required to check whether the repeatability requirement (clause 9) is met, carry out two single determinations in
accordance with 6.1 to 6.2.
6.1 Test portion
Weigh, to the nearest 0,01 g, into a 250 ml beaker (3.1) (400 ml in the case of sweetened products) 10 g to 100 g of
th
...
SLOVENSKI STANDARD
SIST ISO 751:1998
01-november-1998
6DGQLLQ]HOHQMDYQLSURL]YRGL'RORþHYDQMHYYRGLQHWRSQLKVQRYL
Fruit and vegetable products -- Determination of water-insoluble solids
Produits dérivés des fruits et légumes -- Détermination du résidu sec insoluble dans l'eau
Ta slovenski standard je istoveten z: ISO 751:1998
ICS:
67.080.01 Sadje, zelenjava in njuni Fruits, vegetables and
proizvodi na splošno derived products in general
SIST ISO 751:1998 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST ISO 751:1998
---------------------- Page: 2 ----------------------
SIST ISO 751:1998
INTERNATIONAL ISO
STANDARD 751
Second edition
1998-08-01
Fruit and vegetable products —
Determination of water-insoluble solids
Produits dérivés des fruits et légumes — Détermination du résidu sec
insoluble dans l’eau
A
Reference number
ISO 751:1998(E)
---------------------- Page: 3 ----------------------
SIST ISO 751:1998
ISO 751:1998(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 751 was prepared by Technical Committee ISO/TC 34, Agricultural food products,
Subcommittee SC 3, Fruit and vegetable products.
This second edition cancels and replaces the first edition (ISO 751:1981), which has been technically revised.
© 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 iso@iso.ch
Printed in Switzerland
ii
---------------------- Page: 4 ----------------------
SIST ISO 751:1998
INTERNATIONAL STANDARD © ISO ISO 751:1998(E)
Fruit and vegetable products — Determination of water-insoluble
solids
1 Scope
This International Standard specifies a method for the determination of the content of water-insoluble solids in the
edible parts of fruit and vegetable products.
2 Principle
The water-soluble matter in a test portion is dissolved in water, followed by filtration, drying of the residue and
weighing.
3 Apparatus
Usual laboratory apparatus and, in particular, the following.
3.1 Beakers, of capacity 250 ml or 400 ml.
3.2 Buchner funnel.
3.3 Filter paper, medium texture.
3.4 Indicator paper.
3.5 Weighing vessel.
3.6 Desiccator, containing an efficient desiccant.
3.7 Oven, capable of being maintained at 103 °C – 2 °C.
3.8 Centrifuge.
3.9 Analytical balance, capable of weighing to the nearest 0,001 g.
4 Sampling
It is important the laboratory receive a sample which is truly representative and has not been damaged or changed
during transport or storage.
Sampling is not part of the method specified in this International Standard. As there is no specific International
Standard dealing with fruit and vegetable products, it is recommended that the parties concerned come to an
agreement on the subject.
1
---------------------- Page: 5 ----------------------
SIST ISO 751:1998
© ISO
ISO 751:1998(E)
5 Preparation of test sample and of apparatus
5.1 Preparation of test sample
Separate and remove from the laboratory sample stalks, stones, hard seed-cavity walls and, whenever possible,
pips (after thawing in the case of frozen or deep-frozen products). Mix the sample thoroughly.
Allow frozen or deep-frozen products to thaw in a closed vessel and add the liquid formed during this process to the
product before mixing.
If it is desired to express the result in terms of the sample as received, weigh the latter before removing stalks,
stones, etc. Weigh these after washing and drying and take them into account in the expression of results (
...
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