EN CR12471-1996 Screening tests for nickel releas

CENREPORTRAPPORTCENCENBERICHTCR12471August2002ICS39.060EnglishversionScreeningtestsfornickelreleasefromalloysandcoatingsinitemsthatcomeintodirectandprolongedcontactwiththeskinMéthodedetripourlalibérationdunickeldesalliagesetrevêtementsprésentssurlesarticlesdeconsommationentrantencontactdirectetprolongéaveclapeauSchnelltestfürdieNickelabgabeausLegierungenundAuflagenaufGegenständen,diemitderHautindirekteundlängerandauerndeBerührungkommenThisCENReportwasapprovedbyCENon13April2002.IthasbeendrawnupbytheTechnicalCommitteeCEN/TC283.CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom.EUROPEANCOMMITTEEFORSTANDARDIZATIONCOMITÉEUROPÉENDENORMALISATIONEUROPÄISCHESKOMITEEFÜRNORMUNGManagementCentre:ruedeStassart,36B-1050Brussels©2002CENAllrightsofexploitationinanyformandbyanymeansreservedworldwideforCENnationalMembers.Ref.No.CR12471:2002E(E)2ContentspageForeword......................................................................................................................................................................3Introduction.................................................................................................................................................................41Scope..............................................................................................................................................................52Shortdescriptionofthemethods................................................................................................................53Reagents.........................................................................................................................................................54Equipment.......................................................................................................................................................55Procedure.......................................................................................................................................................65.1Preparationofsolutions................................................................................................................................65.2Samplepreparation.......................................................................................................................................65.3Testmethods..................................................................................................................................................76Interpretationofresults.................................................................................................................................86.1Positiveresult.................................................................................................................................................86.2Negativeresult...............................................................................................................................................96.3Uncertainresult..............................................................................................................................................97Testreport......................................................................................................................................................9Bibliography..............................................................................................................................................................10(E)3ForewordThisdocument(CR12471:2002)hasbeenpreparedbyTechnicalCommitteeCEN/TC283Preciousmetals-Applicationsinjewelleryandassociatedproducts,thesecretariatofwhichisheldbyUNI.(E)4IntroductionThisdocumenthasbeendevelopedasasimple,quickandinexpensivemeansforqualitativelytestingfornickelreleasefrom(mainly)consumeritems.Ithasparticularrelevanceinrelationtoallergiccontactdermatitisduetonickelallergy.Thetestsdescribedarequickandeasytoconductandtwoofthemaresuitableforapplicationoutsideofthelaboratory.EuropeanParliamentandCouncilDirective94/27/EC(OJNo.L188of22.7.94)hassetanickelreleaseratethresholdof0,5μg/cm2/week.Althoughthepresentdocumentwillgiveinformationconcerningnickelrelease,resultsobtainedfromitsapplicationdonotconstituteconfirmationorotherwiseofcompliancewiththedirective.Inordertoshowcompliancewiththedirective,itisnecessarythatitemsaretestedinaccordancewithEuropeanStandardsEN1810,EN1811orEN12472,asappropriate,dependinguponthenatureoftheitemtobetested.(E)51ScopeThisdocumentpresentsascreeningprocedure,basedprimarilyontheuseofdimethylglyoxime,forthedetectionofnickelreleasefromitemsthatcomeintodirectandprolongedcontactwiththeskin.Thetestsprovidequalitative,notquantitative,results.NOTE-EN1811specifiesaquantitativereferencetestforthereleaseofnickel.2ShortdescriptionofthemethodsThet