Fruit and vegetable products -- Determination of mineral impurities content

This international Standard specifies a method for the determination of the mineral impurities content (impurities generally originating from the soil) of fruit and vegetable products.

Produits dérivés des fruits et légumes -- Détermination de la teneur en impuretés minérales d'origine terreuse

Sadni in zelenjavni proizvodi - Določevanje mineralnih nečistoč

Ta mednarodni standard določa metodo za določevanje mineralnih nečistoč (nečistoče, ki izvirajo iz prsti) sadnih in zelenjavnih proizvodov.

General Information

Status
Published
Public Enquiry End Date
19-May-2011
Publication Date
15-May-2011
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
06-May-2011
Due Date
11-Jul-2011
Completion Date
16-May-2011

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INTERNATIONAL ISO
STANDARD 762
Second edition
2003-11-15
Fruit and vegetable products —
Determination of mineral impurities
content
Produits dérivés des fruits et légumes — Détermination de la teneur en
impuretés minérales d'origine terreuse
Reference number
ISO 762:2003(E)
ISO 2003
---------------------- Page: 1 ----------------------
ISO 762:2003(E)
PDF disclaimer

This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but

shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In

downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat

accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.

Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation

parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In

the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.

© ISO 2003

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 either ISO at the address below or

ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2003 — All rights reserved
---------------------- Page: 2 ----------------------
ISO 762:2003(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.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. 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.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 762 was prepared by Technical Committee ISO/TC 34, Food products, Subcommittee SC 3, Fruit and

vegetable products.

This second edition cancels and replaces the first edition (ISO 762:1982), which has been technically revised.

© ISO 2003 — All rights reserved iii
---------------------- Page: 3 ----------------------
INTERNATIONAL STANDARD ISO 762:2003(E)
Fruit and vegetable products — Determination of mineral
impurities content
1 Scope

This international Standard specifies a method for the determination of the mineral impurities content

(impurities generally originating from the soil) of fruit and vegetable products.

2 Principle

Organic matter is separated by flotation and heavy impurities are separated by sedimentation. The sediment

is incinerated at approximately 525 °C, and the residue obtained is weighed.
3 Apparatus
Usual laboratory equipment and, in particular, the following.
3.1 Blender.
3.2 Beakers, of capacities 1 000 ml.
3.3 Filter paper, Whatman No. 41 or equivalent.
3.4 Incineration dishes, made of quartz, porcelain or platinum.
3.5 Muffle furnace, capable of being maintained at 525 °C ± 25 °C.
3.6 Desiccator, provided with an efficient desiccant.
3.7 Analytical balance, capable of weighing to the nearest 0,000 2 g.
3.8 Heater, gas or electric.
3.9 Sieve, of pore size ca. 1 mm to 2 mm.
3.10 Stirring rod.
3.11 Washing equipment, for washing out the impurities (see Figure 1).

1) Whatman No. 41 is an example of a suitable product available commercially. This information is given for the

convenience of users of this International Standard and does not constitute an endorsement by ISO of this product.

© ISO 2003 — All rights reserved 1
---------------------- Page: 4 ----------------------
ISO 762:2003(E)
4 Preparation of test sample
4.1 General case

Before taking the test portion, thoroughly mix the entire laboratory sample using, if necessary, the blender

(3.1). 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.
4.2 Dried products

Mix the laboratory sample well. Weigh 20 g ± 0,1 g of the product, transfer it to a beaker (3.2) and add 400 ml

of filtered tap water. Bring to the boil, then leave overnight at room temperature to allow the product to

rehydrate.
...

SLOVENSKI STANDARD
SIST ISO 762:2011
01-junij-2011
1DGRPHãþD
SIST ISO 762:1995
6DGQLLQ]HOHQMDYQLSURL]YRGL'RORþHYDQMHPLQHUDOQLKQHþLVWRþ
Fruit and vegetable products -- Determination of mineral impurities content

Produits dérivés des fruits et légumes -- Détermination de la teneur en impuretés

minérales d'origine terreuse
Ta slovenski standard je istoveten z: ISO 762:2003
ICS:
67.080.01 Sadje, zelenjava in njuni Fruits, vegetables and
proizvodi na splošno derived products in general
SIST ISO 762:2011 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST ISO 762:2011
---------------------- Page: 2 ----------------------
SIST ISO 762:2011
INTERNATIONAL ISO
STANDARD 762
Second edition
2003-11-15
Fruit and vegetable products —
Determination of mineral impurities
content
Produits dérivés des fruits et légumes — Détermination de la teneur en
impuretés minérales d'origine terreuse
Reference number
ISO 762:2003(E)
ISO 2003
---------------------- Page: 3 ----------------------
SIST ISO 762:2011
ISO 762:2003(E)
PDF disclaimer

This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but

shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In

downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat

accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.

Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation

parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In

the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.

© ISO 2003

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 either ISO at the address below or

ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2003 — All rights reserved
---------------------- Page: 4 ----------------------
SIST ISO 762:2011
ISO 762:2003(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.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. 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.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 762 was prepared by Technical Committee ISO/TC 34, Food products, Subcommittee SC 3, Fruit and

vegetable products.

This second edition cancels and replaces the first edition (ISO 762:1982), which has been technically revised.

© ISO 2003 — All rights reserved iii
---------------------- Page: 5 ----------------------
SIST ISO 762:2011
---------------------- Page: 6 ----------------------
SIST ISO 762:2011
INTERNATIONAL STANDARD ISO 762:2003(E)
Fruit and vegetable products — Determination of mineral
impurities content
1 Scope

This international Standard specifies a method for the determination of the mineral impurities content

(impurities generally originating from the soil) of fruit and vegetable products.

2 Principle

Organic matter is separated by flotation and heavy impurities are separated by sedimentation. The sediment

is incinerated at approximately 525 °C, and the residue obtained is weighed.
3 Apparatus
Usual laboratory equipment and, in particular, the following.
3.1 Blender.
3.2 Beakers, of capacities 1 000 ml.
3.3 Filter paper, Whatman No. 41 or equivalent.
3.4 Incineration dishes, made of quartz, porcelain or platinum.
3.5 Muffle furnace, capable of being maintained at 525 °C ± 25 °C.
3.6 Desiccator, provided with an efficient desiccant.
3.7 Analytical balance, capable of weighing to the nearest 0,000 2 g.
3.8 Heater, gas or electric.
3.9 Sieve, of pore size ca. 1 mm to 2 mm.
3.10 Stirring rod.
3.11 Washing equipment, for washing out the impurities (see Figure 1).

1) Whatman No. 41 is an example of a suitable product available commercially. This information is given for the

convenience of users of this International Standard and does not constitute an endorsement by ISO of this product.

© ISO 2003 — All rights reserved 1
---------------------- Page: 7 ----------------------
SIST ISO 762:2011
ISO 762:2003(E)
4 Preparation of test sample
4.1 General cas
...

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