Certification of Salmonella in milk powder, feasibility study

2.50
Hdl Handle:
http://hdl.handle.net/10029/256316
Title:
Certification of Salmonella in milk powder, feasibility study
Authors:
Veld PH in 't; Strijp-Lockefeer NGWM van; Hoekstra JA
Other Titles:
Certificatie van Salmonella in melkpoeder, een voorstudie
Abstract:
Abstract niet beschikbaar

A feasibility study was undertaken for the certification of a reference material containing low numbers of Salmonella. A batch of 8800 capcules was prepared and eleven laboratories each enumerated 50 capsules from this batch, according to a standardized procedure. The results from four laboratories were excluded from the analysis of data after the first step of the statistical analysis based on their results found for homogeneity and mean contamination level. The remaining seven laboratories found contamination levels that did not differ significantly from each other. The mean contamination level found by these seven laboratories was 5.65 cfu/capsule. The homogeneity, based on all counts by these seven laboratories, was not fully conform to a Poisson distribution. A ratio of variance to mean of 1.18 was found, which is considered acceptable. The proportion of negative capsules found in the study was 0.58% and the upper limit of the corresponding confidence interval (one sided, (alpha = 0.05) was 1.8%. Concluded was that the batch prepared is of sufficient to be used for a certification study.
Issue Date:
31-May-1992
URI:
http://hdl.handle.net/10029/256316
Additional Links:
http://www.rivm.nl/bibliotheek/rapporten/281008002.html
Type:
Onderzoeksrapport
Language:
en
Sponsors:
EG/BCR HIGB VHI
Appears in Collections:
RIVM official reports

Full metadata record

DC FieldValue Language
dc.contributor.authorVeld PH in 't-
dc.contributor.authorStrijp-Lockefeer NGWM van-
dc.contributor.authorHoekstra JA-
dc.date.accessioned2012-12-12T13:50:18Z-
dc.date.available2012-12-12T13:50:18Z-
dc.date.issued1992-05-31-
dc.identifier281008002-
dc.identifier.urihttp://hdl.handle.net/10029/256316-
dc.description.abstractAbstract niet beschikbaarnl
dc.description.abstractA feasibility study was undertaken for the certification of a reference material containing low numbers of Salmonella. A batch of 8800 capcules was prepared and eleven laboratories each enumerated 50 capsules from this batch, according to a standardized procedure. The results from four laboratories were excluded from the analysis of data after the first step of the statistical analysis based on their results found for homogeneity and mean contamination level. The remaining seven laboratories found contamination levels that did not differ significantly from each other. The mean contamination level found by these seven laboratories was 5.65 cfu/capsule. The homogeneity, based on all counts by these seven laboratories, was not fully conform to a Poisson distribution. A ratio of variance to mean of 1.18 was found, which is considered acceptable. The proportion of negative capsules found in the study was 0.58% and the upper limit of the corresponding confidence interval (one sided, (alpha = 0.05) was 1.8%. Concluded was that the batch prepared is of sufficient to be used for a certification study.en
dc.description.sponsorshipEG/BCR HIGB VHI-
dc.format.extent30 p-
dc.language.isoen-
dc.relation.ispartofRIVM Rapport 281008002-
dc.relation.urlhttp://www.rivm.nl/bibliotheek/rapporten/281008002.html-
dc.subject11nl
dc.subjectsalmonellanl
dc.subjectvoedingnl
dc.subjectdetectienl
dc.subjectreferentiematerialennl
dc.subjectcertificatienl
dc.subjectmelkpoedernl
dc.subjectringonderzoeknl
dc.subjectsalmonellaen
dc.subjectmilk productsen
dc.subjectfooden
dc.subjectidentificationen
dc.subjectreference materialsen
dc.subjectcertificationen
dc.titleCertification of Salmonella in milk powder, feasibility studyen
dc.title.alternativeCertificatie van Salmonella in melkpoeder, een voorstudienl
dc.typeOnderzoeksrapport-
dc.date.updated2012-12-12T13:50:18Z-
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