SIST EN 1122:2002

Plastics - Determination of cadmium - Wet decomposition method

This European Standard describes a method for the determination of the total cadmium (Cd) content in plastics in the range of 10 mg Cd/kg to 3.000 mg Cd/kg. It is not suitable for polyfluorated plastic materials.

Kunststoffe - Bestimmung von Cadmium - Nassaufschlussverfahren

Diese Europäische Norm beschreibt ein Verfahren zur Bestimmung des Gesamtgehaltes von Cadmium (Cd) in Kunststoffen im Bereich von 10 mg Cd/kg. Sie ist nicht anwendbar auf polyfluorierte Kunststoffmaterialien.

Plastiques - Détermination du cadmium - Méthode par décomposition par voie humide

1 Domaine d'application
Cette Norme européenne décrit une méthode de dosage du cadmium (Cd) total dans les plastiques dans la plage comprise entre 10 mg Cd/kg et 3000 mg Cd/kg. Cette méthode n'est pas appropriée aux matériaux plastiques polyfluorés.

Polimerni materiali - Določevanje kadmija - Metoda mokrega razklopa

General Information

• Status: Published
• Publication Date: 31-Jan-2002
• ICS: 83.080.01 - Plastics in general
• Technical Committee: IPMA - Polimer materials and products
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Feb-2002
• Due Date: 01-Feb-2002
• Completion Date: 01-Feb-2002
• Mandate: M/BC/CEN/90/11 - Cadmium
• Ref Project: EN 1122:2001 - Plastics - Determination of cadmium - Wet decomposition method

Relations

• Replaces: SIST ENV 1122:1999 - Determination of cadmium in plastics with the method of the wet decomposition
• Effective Date: 01-Feb-2002

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.SDKunststoffe - Bestimmung von Cadmium - NassaufschlussverfahrenPlastiques - Détermination du cadmium - Méthode par décomposition par voie humidePlastics - Determination of cadmium - Wet decomposition method83.080.01Polimerni materiali na splošnoPlastics in generalICS:Ta slovenski standard je istoveten z:EN 1122:2001SIST EN 1122:2002en01-februar-2002SIST EN 1122:2002SLOVENSKI
STANDARDSIST ENV 1122:19991DGRPHãþD



SIST EN 1122:2002



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 1122March 2001ICS 83.080.01Supersedes ENV 1122:1995English versionPlastics - Determination of cadmium - Wet decompositionmethodPlastiques - Détermination du cadmium - Méthode pardécomposition par voie humideKunststoffe - Bestimmung von Cadmium -NassaufschlussverfahrenThis European Standard was approved by CEN on 18 January 2001.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 1122:2001 ESIST EN 1122:2002



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2EN 1122:2001ForewordThis European Standard has been prepared by Technical Committee CEN/TC 249 "Plastics", thesecretariat of which is held by IBN.This European Standard shall be given the status of a national standard, either by publication of anidentical text or by endorsement, at the latest by September 2001, and conflicting national standardsshall be withdrawn at the latest by September 2001.This European Standard replaces ENV 1122:1995.According to the CEN/CENELEC Internal Regulations, the national standards organizations of thefollowing countries are bound to implement this European Standard: Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.SIST EN 1122:2002



Page 3EN 1122:20011ScopeThis European Standard describes a method for the determination of the total Cadmium (Cd) contentin plastics in the range of 10 mg Cd/kg to 3000 mg Cd/kg. It is not suitable for polyfluorinated plasticmaterials.2Normative ReferencesThis European Standard incorporates by dated or undated reference, provisions from otherpublications. These normative references are cited at the appropriate places in the text and thepublications are listed hereafter. For dated references, subsequent amendments to or revisions of anyof these publications apply to this European Standard only when incorporated in it by amendment orrevision. For undated references the latest edition of the publication referred to applies (includingamendments).ISO 3696:1987Water for analytical laboratory use - Specification and test methods.ISO 3856-4:1984Paints and varnishes - Determination of "soluble" metal content - Part 4:Determination of cadmium content - Flame atomic absorption spectrometricmethod and polarographic method.3PrincipleWet decomposition of organic compounds and disolution of cadmium compounds in a sample.Atomization of a solution in the flame of an atomic absorption spectrophotometer and themeasurement of the absorbance at a wavelength of 228,8 nm.4ReagentsDuring the analysis, use only reagents of recognized analytical grade and only destilled water or waterof equivalent purity (ISO 3696:1987).4.1Sulphuric acidd = 1,83 g/l95 % (m/m)4.2Nitric acidd = 1,40 g/l 65 % (m/m)4.3 Hydrogen peroxided = 1,10 g/l30 % (m/m)4.4 Cadmium metal with a purity of 99,9 % or a commercial cadmium standard stock solution (1 gCd/l) (ISO 3856-4:1984)4.5Cadmium standard solutions (0,5 mg Cd/l and 1,0 mg Cd/l) (ISO 3856-4:1984)5Apparatus5.1Apparatus for wet decomposition (e.g. figure 1), Kjeldahl flask or any other suitableapparatus for wet decomposition.5.2Hot plate5.3Fume cupboard, preferable with air washing5.4Flame atomic absorption spectrophotometer with background correction e.g. D2 orZeemann (ISO 3856-4:1984)SIST EN 1122:2002



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4EN 1122:20015.5Hollow cathode lamp or EDL for cadmium (ISO 3856-4:1984)5.6Analytical balance with range of 1 mg5.7Membrane filter with a pore size of 0,45 m6Test procedure6.1Test SampleUse homogeneous samples of at least 2 g for the analysis. Cut the sample in smaller pieces with aknife or scissor preferable in pieces less than 0,1 g.6.2Test PortionWeigh approximately 0,5 g of the test samples (6.1) to the nearest mg into a decompositionapparatus, e.g. a Kjeldahl flask (5.1). Carry out the analysis in duplicate.6.3Wet DecompositionThe necessary time and reagent consumption for the decomposition depends on the particle size ofthe sample and mainly on the plastic materials.6.3.1 Method AWet decomposition by a mixture of sulphuric acid, nitric acid and hydrogen peroxide. The followingmethod describes the decomposition in the decomposition apparatus (figure 1), but any other suitableapparatus can be used (5.1). Carry out the decomposition in a fume cupboard (5.3).To flask B of the decomposition apparatus (figure 1),
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