ISO 21528-1-2004 食品和动物饲料的微生物学.肠杆菌科检测和计数的水平法.第1部分:通过预浓缩MPN技术进行计数和检测

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【英文标准名称】:Microbiologyoffoodandanimalfeedingstuffs-HorizontalmethodsforthedetectionandenumerationofEnterobacteriaceae-Part1:DetectionandenumerationbyMPNtechniquewithpre-enrichment
【原文标准名称】:食品和动物饲料的微生物学.肠杆菌科检测和计数的水平法.第1部分:通过预浓缩MPN技术进行计数和检测
【标准号】:ISO21528-1-2004
【标准状态】:现行
【国别】:国际
【发布日期】:2004-08
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC34
【标准类型】:()
【标准水平】:()
【中文主题词】:微生物学;定义;食品;肠杆菌科;测定;农产品;试验;微生物分析;验证;浓缩;计数
【英文主题词】:Agriculturalproducts;Bacteria;Counting;Culturemedia;Definitions;Determination;Enrichment;Enterobacteriaceae;Foodproducts;Microbiologicalanalysis;Microbiology;Microorganisms;Testing;Verification
【摘要】:ThispartofISO21528specifiesamethod,withpre-enrichment,forthedetectionofEnterobacteriaceae.Itisapplicableto—productsintendedforhumanconsumptionandthefeedingofanimals,and—environmentalsamplesintheareaoffoodproductionandfoodhandling.Enumerationiscarriedoutbycalculationofthemostprobablenumber(MPN)afterincubationat37℃(or30℃)inliquidmedium.Thismethodisapplicable—whenthemicroorganismssoughtareexpectedtoneedresuscitationbeforeenrichment,and—whenthenumbersoughtisexpectedtobeintherange1to100permillilitreorpergramoftestsample.AlimitationontheapplicabilityofthispartofISO21528isimposedbythesusceptibilityofthemethodtoalargedegreeofvariability(seeClause11).note:1)Thetemperatureof37℃isgenerallyusedwhentheenumerationofEnterobacteriaceaeisforahygienicindicator.Alternatively,atemperatureof30℃canbechosenwhentheenumerationofEnterobacteriaceaeisconductedfortechnologicalpurposesandincludespsychrotrophicEnterobacteriaceae.
【中国标准分类号】:C53
【国际标准分类号】:07_100_01;07_100_30
【页数】:12P.;A4
【正文语种】:英语