ISO 14461-2-2005 奶和奶制品.微生物实验室内质量控制.第2部分:平行板和后续稀释步骤的菌落计数可靠性测定
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【英文标准名称】:Milkandmilkproducts-Qualitycontrolinmicrobiologicallaboratories-Part2:Determinationofthereliabilityofcolonycountsofparallelplatesandsubsequentdilutionsteps
【原文标准名称】:奶和奶制品.微生物实验室内质量控制.第2部分:平行板和后续稀释步骤的菌落计数可靠性测定
【标准号】:ISO14461-2-2005
【标准状态】:现行
【国别】:国际
【发布日期】:2005-04
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC34
【标准类型】:()
【标准水平】:()
【中文主题词】:农产品;乳制品分析;微生物学;微生物分析;试验;实验室;菌落计数技术;奶制品;菌落计数;质量控制;可靠度;牛奶;乳制品;食品检验;定义;食品
【英文主题词】:
【摘要】:ThispartofISO14461|IDF169describesaroutineprocedurefortheevaluationofresultsoftheenumerationofmicroorganismsusingcolony-countmethodswithsubsequent10-folddilutionstepsandoneplateortwoparallelplateswithineachdilutionstep.Thisroutineprocedureisappliedregularlyineachlaboratoryperformingcolonycounts.Itprovidescriteriafortheacceptabilityofdifferencesbetweentheresultsfromparallelplatesandsubsequentdilutionsteps,asfollows.a)Theresults(colonycounts)obtainedfromparallelplatesarecomparedwithtabulatedlimitsforgivencolonycounts.Iftheselimitsareexceeded,atechnicalproblemwhenperformingtheparalleldeterminationsmaybeindicated.b)Theresults(sumsofcolonycounts)oftwoparallelplatesoftwosubsequent10-folddilutionstepsarecomparedwithtabulatedlimitsforgivensumsofcolonycounts.Iftheselimitsareexceeded,atechnicalproblemwhenperformingthedilutionsmaybeindicated.c)Ifthelimitsmentionedaboveareexceededinmorecasesthanexpected,thisindicatesthatthetestprocedurelacksreliability.NOTETheformulaeforcalculatingthevaluesinTable1and2aregivenandexplainedinClause7.
【中国标准分类号】:X16
【国际标准分类号】:07_100_30
【页数】:18P;A4
【正文语种】:英语
【原文标准名称】:奶和奶制品.微生物实验室内质量控制.第2部分:平行板和后续稀释步骤的菌落计数可靠性测定
【标准号】:ISO14461-2-2005
【标准状态】:现行
【国别】:国际
【发布日期】:2005-04
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC34
【标准类型】:()
【标准水平】:()
【中文主题词】:农产品;乳制品分析;微生物学;微生物分析;试验;实验室;菌落计数技术;奶制品;菌落计数;质量控制;可靠度;牛奶;乳制品;食品检验;定义;食品
【英文主题词】:
【摘要】:ThispartofISO14461|IDF169describesaroutineprocedurefortheevaluationofresultsoftheenumerationofmicroorganismsusingcolony-countmethodswithsubsequent10-folddilutionstepsandoneplateortwoparallelplateswithineachdilutionstep.Thisroutineprocedureisappliedregularlyineachlaboratoryperformingcolonycounts.Itprovidescriteriafortheacceptabilityofdifferencesbetweentheresultsfromparallelplatesandsubsequentdilutionsteps,asfollows.a)Theresults(colonycounts)obtainedfromparallelplatesarecomparedwithtabulatedlimitsforgivencolonycounts.Iftheselimitsareexceeded,atechnicalproblemwhenperformingtheparalleldeterminationsmaybeindicated.b)Theresults(sumsofcolonycounts)oftwoparallelplatesoftwosubsequent10-folddilutionstepsarecomparedwithtabulatedlimitsforgivensumsofcolonycounts.Iftheselimitsareexceeded,atechnicalproblemwhenperformingthedilutionsmaybeindicated.c)Ifthelimitsmentionedaboveareexceededinmorecasesthanexpected,thisindicatesthatthetestprocedurelacksreliability.NOTETheformulaeforcalculatingthevaluesinTable1and2aregivenandexplainedinClause7.
【中国标准分类号】:X16
【国际标准分类号】:07_100_30
【页数】:18P;A4
【正文语种】:英语
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