Paper and board - Paper and board intended to come into contact with foodstuffs - Determination of mercury in an aqueous extract

This European Standard is one in a series of Standards for the determination of heavy metals in an aqueous extract of paper and paperboard intended for contact with food. This European Standard specifies the test method for the determination of mercury in an aqueous extract.
It is applicable to paper and board with extractable mercury content exceeding 0,06 mg per kg.
NOTE 1   The above limit of determination is 5 times below than the actual limit existing today or proposed in Europe.
NOTE 2   Mercury content levels below 0,06 mg per kg can be measured by this European Standard if very sensitive equipment is available and if all other laboratory conditions fulfil the requirements for trace element analysis.

Papier und Pappe - Papier und Pappe für den Kontakt mit Lebensmitteln - Bestimmung von Quecksilber in einem wässrigen Extrakt

Diese Europäische Norm ist Bestandteil einer Reihe von Normen, die die Bestimmung von Schwermetallen in
wässrigen Extrakten von Papier, Karton und Pappe, die in Kontakt mit Lebensmittel kommen, festlegen. Diese
Europäische Norm legt ein Prüfverfahren zur quantitativen Bestimmung von Quecksilber in einem wässrigen
Extrakt fest.
Sie ist anwendbar auf Papier, Karton und Pappe mit extrahierbaren Quecksilbergehalten, die den Wert von
0,06 mg je kg überschreiten.
ANMERKUNG 1 Die vorstehend genannte Bestimmungsgrenze ist 5-mal geringer als das zurzeit existierende oder in
Europa vorgeschlagene Limit.
ANMERKUNG 2 Quecksilbergehalte, die unterhalb der Bestimmungsgrenze von 0,06 mg je kg liegen, können mit dieser
Europäischen Norm gemessen werden, wenn eine geeignete empfindliche Laborausstattung vorhanden ist. Ferner
müssen für die Spurenelementanalyse alle anderen Laborbedingungen die Anforderungen erfüllen.

Papier et carton - Papiers et cartons destinés a entrer en contact avec les denrées alimentaires - Détermination du mercure dans un extrait aqueux

La présente Norme européenne fait partie d'une série de normes pour la détermination des métaux lourds
dans un extrait aqueux de papier ou de carton destiné a entrer en contact avec les denrées alimentaires. La
présente Norme européenne prescrit la méthode d'essai pour la détermination du mercure dans un extrait
aqueux.
Elle est applicable aux papiers et cartons ayant des teneurs en mercure extractible dépassant 0,06 mg par
kilogramme.
NOTE 1 La limite de détermination indiquée ci-dessus est 5 fois plus basse que la limite réelle existant actuellement ou
proposée en Europe.
NOTE 2 Les teneurs en mercure inférieures a 0,06 mg/kg peuvent etre mesurées selon cette Norme européenne si
l'on dispose d'un appareillage tres sensible et si les autres conditions dans le laboratoire satisfont aux exigences de
l'analyse des éléments a l'état de traces.

Papir, karton in lepenka – Papir, karton in lepenka v neposrednem stiku z živili – Določevanje živega srebra v vodnem ekstraktu

General Information

Status
Published
Publication Date
30-Nov-2005
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Dec-2005
Due Date
01-Dec-2005
Completion Date
01-Dec-2005

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SLOVENSKI STANDARD
SIST EN 12497:2005
01-december-2005
1DGRPHãþD
SIST ENV 12497:2000

3DSLUNDUWRQLQOHSHQND±3DSLUNDUWRQLQOHSHQNDYQHSRVUHGQHPVWLNX]åLYLOL±

'RORþHYDQMHåLYHJDVUHEUDYYRGQHPHNVWUDNWX

Paper and board - Paper and board intended to come into contact with foodstuffs -

Determination of mercury in an aqueous extract

Papier und Pappe - Papier und Pappe für den Kontakt mit Lebensmitteln - Bestimmung

von Quecksilber in einem wässrigen Extrakt

Papier et carton - Papiers et cartons destinés a entrer en contact avec les denrées

alimentaires - Détermination du mercure dans un extrait aqueux
Ta slovenski standard je istoveten z: EN 12497:2005
ICS:
67.250 Materiali in predmeti v stiku z Materials and articles in
živili contact with foodstuffs
85.060 Papir, karton in lepenka Paper and board
SIST EN 12497:2005 en

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

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SIST EN 12497:2005
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SIST EN 12497:2005
EUROPEAN STANDARD
EN 12497
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2005
ICS 67.250; 85.060 Supersedes ENV 12497:1998
English Version
Paper and board - Paper and board intended to come into
contact with foodstuffs - Determination of mercury in an aqueous
extract

Papier et carton - Papiers et cartons destinés à entrer en Papier und Pappe - Papier und Pappe für den Kontakt mit

contact avec les denrées alimentaires - Détermination du Lebensmitteln - Bestimmung von Quecksilber in einem

mercure dans un extrait aqueux wässrigen Extrakt
This European Standard was approved by CEN on 27 June 2005.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European

Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national

standards may be obtained on application to the Central Secretariat or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official

versions.

CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,

Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,

Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels

© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12497:2005: E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 12497:2005
EN 12497:2005 (E)
Contents page

Foreword ..........................................................................................................................................................3

1 Scope...................................................................................................................................................4

2 Normative references.........................................................................................................................4

3 Principle...............................................................................................................................................4

4 Reagents..............................................................................................................................................4

4.1 General................................................................................................................................................4

4.2 Nitric acid (HNO3), 65 % (d = 1,42).....................................................................................................4

4.2.1 Nitric acid (4.2), diluted 1 : 1 (V/V) with water ...................................................................................4

4.2.2 Nitric acid (4.2), diluted to 1,5 % (V/V) with water.............................................................................4

4.3 Potassium permanganate (KMnO ), 5 % aqueous solution (m/V) ...................................................4

4.4 Mercury, stock solution, 1000 mg/l....................................................................................................4

Sulphuric acid (H SO ), (d = 1,84)...................................................................................................................5

2 4

4.6 Potassium dichromate (K Cr O ), 50 g/l in sulphuric acid solution ................................................5

2 2 7

4.7 Hydroxylammonium chloride (HONH Cl), 20 g/l aqueous solution.................................................5

4.8 Reducing solutions.............................................................................................................................5

4.8.1 Tin (II) chloride (SnCl ⋅⋅⋅⋅ 2H O), 50 g/l in 10 % hydroxhloric acid (4.9.1) ..........................................5

2 2

4.8.2 Sodium tetrahydroborate (NaBH ), 0,2 g/l in 0,05 % sodium hydroxide solution (4.10) ................5

4.9 Hydrochloric acid (HCl), 36 % (d = 1,19)............................................................................................5

4.9.1 Hydrochloric acid (4.9) (HCl), diluted 10 % (V/V) ..............................................................................5

4.10 Sodium hydroxide (NaOH), 0,05 % aqueous solution (m/V) ............................................................5

5 Apparatus............................................................................................................................................5

5.1 General................................................................................................................................................5

5.2 General laboratory equipment ...........................................................................................................5

5.3 Volumetric flasks, 100 ml ...................................................................................................................5

5.4 Analytical balance, accuracy 0,1 mg .................................................................................................5

5.5 Pipettes from 100 µl to 10 ml, glass or plastics, (high density polyethylene/polypropylene).......5

5.6 Atomic absorption spectrometer with an appropriate detection system and sensitivity..............6

6 Preparation of sample........................................................................................................................6

7 Procedure............................................................................................................................................6

7.1 General................................................................................................................................................6

7.2 Preparation of reference solution......................................................................................................6

7.3 Determination of mercury...................................................................................................................6

7.3.1 General................................................................................................................................................6

7.3.2 Standard additions..............................................................................................................................7

7.4 Determination of blank value .............................................................................................................7

8 Expression of results..........................................................................................................................7

9 Precision..............................................................................................................................................8

10 Test report...........................................................................................................................................8

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SIST EN 12497:2005
EN 12497:2005 (E)
Foreword

This European Standard (EN 12497:2005) has been prepared by Technical Committee CEN/TC 172 “Pulp,

paper and board”, the secretariat of which is held by DIN.

This European Standard shall be given the status of a national standard, either by publication of an identical

text or by endorsement, at the latest by February 2006, and conflicting national standards shall be withdrawn

at the latest by February 2006.

This European Standard supersedes ENV 12497:1998. With regard to ENV 12497:1998 the following

changes have been made:
a) implementation in a European Standard;
b) addition of the clause "Precision";
c) editorial updating.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following

countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,

Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland

and United Kingdom.
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SIST EN 12497:2005
EN 12497:2005 (E)
1 Scope
This European Standard is one in a series of standards for the
...

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