SIST ISO 6495:2000
(Main)Animal feeding stuffs -- Determination of water-soluble chlorides content
Animal feeding stuffs -- Determination of water-soluble chlorides content
Aliments des animaux -- Détermination de la teneur en chlorures solubles dans l'eau
Krma - Določevanje v vodi topnih kloridov
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aliments des animaux -- Détermination de la teneur en chlorures solubles dans l'eauAnimal feeding stuffs -- Determination of water-soluble chlorides content65.120KrmilaAnimal feeding stuffsICS:Ta slovenski standard je istoveten z:ISO 6495:1999SIST ISO 6495:2000en01-maj-2000SIST ISO 6495:2000SLOVENSKI
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SIST ISO 6495:2000
AReference numberISO 6495:1999(E)INTERNATIONALSTANDARDISO6495Second edition1999-04-01Animal feeding stuffs — Determinationof water-soluble chlorides contentAliments des animaux — Détermination de la teneur en chlorures solublesdans l'eauSIST ISO 6495:2000
ISO 6495:1999(E)©
ISO 1999All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronicor mechanical, including photocopying and microfilm, without permission in writing from the publisher.International Organization for StandardizationCase postale 56 · CH-1211 Genève 20 · SwitzerlandInternetiso@iso.chPrinted in SwitzerlandiiForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISOmember bodies). The work of preparing International Standards is normally carried out through ISO technicalcommittees. Each member body interested in a subject for which a technical committee has been established hasthe right to be represented on that committee. International organizations, governmental and non-governmental, inliaison with ISO, also take part in the work. ISO collaborates closely with the International ElectrotechnicalCommission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.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 6495 was prepared by Technical Committee ISO/TC 34, Agricultural food products,Subcommittee SC 10, Animal feeding stuffs.This second edition of ISO 6495 cancels and replaces the first edition (ISO 6495:1980), which has been technicallyrevised.Annex A of this International Standard is for information only.SIST ISO 6495:2000
INTERNATIONAL STANDARD
© ISOISO 6495:1999(E)1Animal feeding stuffs — Determination of water-solublechlorides content1 ScopeThis International Standard specifies a method for the determination of the water-soluble chlorides content,expressed as sodium chloride, of animal feeding stuffs.The method is applicable to animal feeding stuffs.2 Normative referencesThe following normative documents contain provisions which, through reference in this text, constitute provisions ofthis International Standard. For dated references, subsequent amendments to, or revisions of, any of thesepublications do not apply. However, parties to agreements based on this International Standard are encouraged toinvestigate the possibility of applying the most recent editions of the normative documents indicated below. Forundated references, the latest edition of the normative document referred to applies. Members of ISO and IECmaintain registers of currently valid International Standards.ISO 3696, Water for analytical laboratory use — Specification and test methods.ISO 6498, Animal feeding stuffs — Preparation of test samples.3 PrincipleThe chlorides present in a test portion are dissolved in water. The solution is clarified if the product contains organicmatter. It is then slightly acidified with nitric acid and the chlorides are precipitated as silver chloride by means ofstandard volumetric silver nitrate solution. The excess silver nitrate is titrated with a standard volumetric solution ofammonium thiocyanate or potassium thiocyanate.4 ReagentsUse only reagents of recognized analytical grade.4.1
Water, complying with at least grade 3 in accordance with ISO 3696.4.2
Acetone.4.3
n-Hexane.4.4
Nitric acid, r20(HNO3) = 1,38 g/ml.4.5
Activated carbon, free from chlorides and not capable of adsorbing chlorides.4.6
Ammonium iron(III) sulfate, saturated solution.Prepare from NH4Fe(SO4)2×12H2O.SIST ISO 6495:2000
ISO 6495:1999(E)© ISO24.7
Carrez I solution.Dissolve in water, 10,6 g of potassium hexacyanoferrate(II) trihydrate [K4Fe(CN)6×3H2O]. Dilute to 100 ml withwater.4.8
Carrez II solution.Dissolve in water, 21,9 g of zinc acetate dihydrate [Zn(CH3COO)2×2H2O] and add 3 ml of glacial acetic acid. Diluteto 100 ml with water.4.9
Ammonium thiocyanate or potassium thiocyanate, standard volumetric solution, c(NH4SCN) = 0,1 mol/l orc(KSCN) = 0,1 mol/l.4.10
Silver nitrate, standard volumetric solution, c(AgNO3) = 0,1 mol/l.5 ApparatusUsual laboratory apparatus and, in particular, the following.5.1
Rotary shaker, operating at a rotation frequency of approximately 3
...
INTERNATIONAL ISO
STANDARD 6495
Second edition
1999-04-01
Animal feeding stuffs — Determination
of water-soluble chlorides content
Aliments des animaux — Détermination de la teneur en chlorures solubles
dans l'eau
A
Reference number
ISO 6495:1999(E)
---------------------- Page: 1 ----------------------
ISO 6495:1999(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 3.
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 6495 was prepared by Technical Committee ISO/TC 34, Agricultural food products,
Subcommittee SC 10, Animal feeding stuffs.
This second edition of ISO 6495 cancels and replaces the first edition (ISO 6495:1980), which has been technically
revised.
Annex A of this International Standard is for information only.
© ISO 1999
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 6495:1999(E)
Animal feeding stuffs — Determination of water-soluble
chlorides content
1 Scope
This International Standard specifies a method for the determination of the water-soluble chlorides content,
expressed as sodium chloride, of animal feeding stuffs.
The method is applicable to animal feeding stuffs.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of
this International Standard. For dated references, subsequent amendments to, or revisions of, any of these
publications do not apply. However, parties to agreements based on this International Standard are encouraged to
investigate the possibility of applying the most recent editions of the normative documents indicated below. For
undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC
maintain registers of currently valid International Standards.
ISO 3696, Water for analytical laboratory use — Specification and test methods.
ISO 6498, Animal feeding stuffs — Preparation of test samples.
3 Principle
The chlorides present in a test portion are dissolved in water. The solution is clarified if the product contains organic
matter. It is then slightly acidified with nitric acid and the chlorides are precipitated as silver chloride by means of
standard volumetric silver nitrate solution. The excess silver nitrate is titrated with a standard volumetric solution of
ammonium thiocyanate or potassium thiocyanate.
4 Reagents
Use only reagents of recognized analytical grade.
4.1 Water, complying with at least grade 3 in accordance with ISO 3696.
4.2 Acetone.
4.3 n-Hexane.
4.4 Nitric acid, r (HNO ) = 1,38 g/ml.
20 3
4.5 Activated carbon, free from chlorides and not capable of adsorbing chlorides.
4.6 Ammonium iron(III) sulfate, saturated solution.
Prepare from NH Fe(SO ) ⋅12H O.
4 4 2 2
1
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© ISO
ISO 6495:1999(E)
4.7 Carrez I solution.
Dissolve in water, 10,6 g of potassium hexacyanoferrate(II) trihydrate [K Fe(CN) ⋅3H O]. Dilute to 100 ml with
4 6 2
water.
4.8 Carrez II solution.
Dissolve in water, 21,9 g of zinc acetate dihydrate [Zn(CH COO) ⋅2H O] and add 3 ml of glacial acetic acid. Dilute
3 2 2
to 100 ml with water.
4.9 Ammonium thiocyanate or potassium thiocyanate, standard volumetric solution, c(NH SCN) = 0,1 mol/l or
4
c(KSCN) = 0,1 mol/l.
4.10 Silver nitrate, standard volumetric solution, c(AgNO ) = 0,1 mol/l.
3
5 Apparatus
Usual laboratory apparatus and, in particular, the following.
–1 –1
5.1 Rotary shaker, operating at a rotation frequency of approximately 35 min to 40 min .
5.2 One-mark volumetric flasks, of capacities 200 ml and 500 ml.
5.3 Pipettes, of appropriate capacity.
5.4 Burettes.
5.5 Analytical balance, capable of weighing to
...
NORME ISO
INTERNATIONALE 6495
Deuxième édition
1999-04-01
Aliments des animaux — Détermination de
la teneur en chlorures solubles dans l'eau
Animal feeding stuffs — Determination of water-soluble chlorides content
A
Numéro de référence
ISO 6495:1999(F)
---------------------- Page: 1 ----------------------
ISO 6495:1999(F)
Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes nationaux de
normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est en général confiée aux
comités techniques de l'ISO. Chaque comité membre intéressé par une étude a le droit de faire partie du comité
technique créé à cet effet. Les organisations internationales, gouvernementales et non gouvernementales, en
liaison avec l'ISO participent également aux travaux. L'ISO collabore étroitement avec la Commission
électrotechnique internationale (CEI) en ce qui concerne la normalisation électrotechnique.
Les Normes internationales sont rédigées conformément aux règles données dans les Directives ISO/CEI, Partie 3.
Les projets de Normes internationales adoptés par les comités techniques sont soumis aux comités membres pour
vote. Leur publication comme Normes internationales requiert l'approbation de 75 % au moins des comités
membres votants.
La Norme internationale ISO 6495 a été élaborée par le comité technique ISO/TC 34, Produits agricoles
alimentaires, sous-comité SC 10, Aliments des animaux.
Cette deuxième édition de l'ISO 6495 annule et remplace la première édition (ISO 6495:1980), dont elle constitue
une révision technique.
L'annexe A de la présente Norme internationale est donnée uniquement à titre d'information.
© ISO 1999
Droits de reproduction réservés. Sauf prescription différente, aucune partie de cette publication ne peut être reproduite ni utilisée sous quelque
forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et les microfilms, sans l'accord écrit de l'éditeur.
Organisation internationale de normalisation
Case postale 56 • CH-1211 Genève 20 • Suisse
Internet iso@iso.ch
Imprimé en Suisse
ii
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NORME INTERNATIONALE © ISO ISO 6495:1999(F)
Aliments des animaux — Détermination de la teneur en chlorures
solubles dans l'eau
1 Domaine d’application
La présente Norme internationale spécifie une méthode de détermination, dans les aliments des animaux, de la
teneur en chlorures solubles dans l'eau, exprimée en chlorure de sodium.
La méthode est applicable aux aliments des animaux.
2 Références normatives
Les documents normatifs suivants contiennent des dispositions qui, par suite de la référence qui y est faite,
constituent des dispositions valables pour la présente Norme internationale. Pour les références datées, les
amendements ultérieurs ou les révisions de ces publications ne s’appliquent pas. Toutefois, les parties prenantes
aux accords fondés sur la présente Norme internationale sont invitées à rechercher la possibilité d’appliquer les
éditions les plus récentes des documents normatifs indiqués ci-après. Pour les références non datées, la dernière
édition du document normatif en référence s’applique. Les membres de l’ISO et de la CEI possèdent le registre des
Normes internationales en vigueur.
ISO 3696, Eau pour laboratoire à usage analytique — Spécification et méthodes d'essai.
ISO 6498, Aliments des animaux — Préparation des échantillons pour essai.
3 Principe
Mise en solution dans l'eau des chlorures présents dans une prise d'essai. Clarification de la solution si le produit
contient des matières organiques. Légère acidification par l'acide nitrique et précipitation des chlorures sous forme
de chlorure d'argent à l'aide d'une solution titrée de nitrate d'argent. Titrage de l'excès de nitrate par une solution
titrée de thiocyanate d'ammonium ou de potassium.
4 Réactifs
Utiliser uniquement des réactifs de qualité analytique reconnue.
4.1 Eau, de qualité au moins 3, conformément à l'ISO 3696.
4.2 Acétone.
4.3 n-Hexane.
4.4 Acide nitrique, r (HNO ) = 1,38 g/ml.
20 3
4.5 Charbon actif, exempt de chlorures et ne pouvant en adsorber.
4.6 Sulfate d'ammonium et de fer(III), solution saturée.
Préparer à partir de NH Fe(SO ) ,12H O.
4 4 2 2
1
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© ISO
ISO 6495:1999(F)
4.7 Solution de Carrez I
Dissoudre, dans de l'eau, 10,6 g d'hexacyanoferrate de potassium(II) trihydraté (K Fe(CN) ,3H O). Compléter à
4 6 2
100 ml avec de l'eau.
4.8 Solution de Carrez II
Dissoudre, dans de l'eau, 21,9 g d'acétate de zinc dihydraté (Zn(CH COO) ,2H O) et ajouter 3 ml d'acide acétique
3 2 2
glacial. Compléter à 100 ml avec de l'eau.
4.9 Thiocyanate d'ammonium ou de potassium, solution titrée, c(NH SCN) = 0,1 mol/l ou c(KSCN) = 0,1 mol/l.
4
4.10 Nitrate d'argent, solution titrée, c(AgNO ) = 0,1 mol/l.
3
5 Appareillage
Matériel courant de laboratoire et, en particulier, ce qui suit.
–1 –1
5.1 Mélangeur
...
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