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dc.contributor.authorJong APJM de
dc.contributor.authorHartog RS den
dc.contributor.authorHijman WC
dc.contributor.authorBoer AC den
dc.contributor.authorMarsman JA
dc.contributor.authorLiem AKD
dc.date.accessioned2012-12-12T21:44:06Z
dc.date.available2012-12-12T21:44:06Z
dc.date.issued1993-05-31
dc.identifier639102004
dc.identifier.urihttp://hdl.handle.net/10029/261108
dc.description.abstractAbstract niet beschikbaar
dc.description.abstractThis report summarizes the results of a first European interlaboratory calibration study by the Bureau of Reference (BCR) of the European Commission on the analysis of PCDD/Fs in milk powder by laboratories of the EC. In total nine laboratories from Belgium (1), Germany (3), England (1) and the Netherlands (4) and two laboratories from Sweden and Finland, respectively, have completed the study. Ten other laboratories, who initially agreed with participation, have not submitted their results. The study comprised of a comparison of the own standards of laboratories with a common standard of the BCR and the analysis of PCDD/Fs in an authentic and two spiked milk powders samples with levels between the background level and five times this level in cow's milk. The overall analytical results by all participant laboratories showed a considerable large variation, both in the quantified amounts in the common standard and the levels in three milk powder samples. Results of about one quarter of laboratories differed significantly the means, whereas the results of the remaining participants agreed well within acceptable limits (+- 25%). In general results of RIVM were close to the means. The within-laboratory reproducibility of RIVM was on average within 10%. The accuracy of the method based on agreement with assigned values, was better than 90% on average. Concentrations of native PCDD/Fs in standard mixture agreed on average within 15% to that in the BCR standards. A comparison on the basis of degree of experience of laboratories showed that, with a few exceptions, a long-standing experience and access to state-of-the art GC/HRMS instrumentation are obviously demanding conditions to be able to perform reliable analysis of PCDD/Fs at the sub parts-per-trillion level in cow's milk.
dc.description.sponsorshipHIGB
dc.format.extent18 p
dc.language.isonl
dc.relation.ispartofRIVM Rapport 639102004
dc.relation.urlhttp://www.rivm.nl/bibliotheek/rapporten/639102004.html
dc.subject11nl
dc.subjectdioxinenl
dc.subjectanalysenl
dc.subjectreferentiewaardennl
dc.subjecteuropanl
dc.subjectpcdden
dc.subjectpcdfen
dc.subjectdairy productsen
dc.subjectanalysisen
dc.subjectcalibrationen
dc.subjectreference standardsen
dc.subjecteuropeen
dc.subjectmilk powderen
dc.subjectringonderzoeken
dc.subjectmelkpoederen
dc.subjectcalibratieen
dc.titleInterlaboratorium Vergelijkingsonderzoek voor de bepaling van Polychloordioxinen en Dibenzofuranen in melkpoeder. Resultaten van deelname aan een eerste Europees ringonderzoek door het Bureau Communautaire de Reference (BCR)nl
dc.title.alternative[European interlaboratory calibration study on the analysis of PCDD/PCDFs in milk powder.]en
dc.typeReport
dc.date.updated2012-12-12T21:44:07Z
html.description.abstractAbstract niet beschikbaar
html.description.abstractThis report summarizes the results of a first European interlaboratory calibration study by the Bureau of Reference (BCR) of the European Commission on the analysis of PCDD/Fs in milk powder by laboratories of the EC. In total nine laboratories from Belgium (1), Germany (3), England (1) and the Netherlands (4) and two laboratories from Sweden and Finland, respectively, have completed the study. Ten other laboratories, who initially agreed with participation, have not submitted their results. The study comprised of a comparison of the own standards of laboratories with a common standard of the BCR and the analysis of PCDD/Fs in an authentic and two spiked milk powders samples with levels between the background level and five times this level in cow's milk. The overall analytical results by all participant laboratories showed a considerable large variation, both in the quantified amounts in the common standard and the levels in three milk powder samples. Results of about one quarter of laboratories differed significantly the means, whereas the results of the remaining participants agreed well within acceptable limits (+- 25%). In general results of RIVM were close to the means. The within-laboratory reproducibility of RIVM was on average within 10%. The accuracy of the method based on agreement with assigned values, was better than 90% on average. Concentrations of native PCDD/Fs in standard mixture agreed on average within 15% to that in the BCR standards. A comparison on the basis of degree of experience of laboratories showed that, with a few exceptions, a long-standing experience and access to state-of-the art GC/HRMS instrumentation are obviously demanding conditions to be able to perform reliable analysis of PCDD/Fs at the sub parts-per-trillion level in cow's milk.


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