BS EN ISO 12966-3-2009 动物和植物的脂肪和油.脂肪酸甲基酯的气相色谱分析.使用三甲基氢氧化硫制备甲基酯

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【英文标准名称】:Animalandvegetablefatsandoils-Gaschromatographyoffattyacidmethylesters-Preparationofmethylestersusingtrimethylsulfoniumhydroxide
【原文标准名称】:动物和植物的脂肪和油.脂肪酸甲基酯的气相色谱分析.使用三甲基氢氧化硫制备甲基酯
【标准号】:BSENISO12966-3-2009
【标准状态】:现行
【国别】:英国
【发布日期】:2010-01-31
【实施或试行日期】:2010-01-31
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:农产品;动物;动物脂肪;动物油;化学分析和试验;酯化作用;酯类;动植物油;脂肪酸甲酯;食品;气相色谱法;实验室取样;测量;测量仪器;测量技术;制造方法;甲酯;油类;生产;报告;试样;抽样方法;试样制备;试验性能;试验报告;试验;试验装置;植物;植物脂肪;植物油
【英文主题词】:Agriculturalproducts;Animal;Animalfats;Animaloils;Chemicalanalysisandtesting;Esterification;Esters;Fats;Fattyacidmethylesters;Foodproducts;Gaschromatography;Laboratorysample;Measurement;Measuringinstruments;Measuringtechniques;Methodsofmanufacture;Methylesters;Oils;Production;Reports;Samples;Samplingmethods;Specimenpreparation;Testperformance;Testreports;Testing;Testingdevices;Vegetable;Vegetablefats;Vegetableoils
【摘要】:ThispartofISO12966specifiesarapidbase-catalysedtransesterificationmethodforfatsandoilswithtrimethylsulfoniumhydroxide(TMSH)topreparefattyacidmethylesters.Themethodisexclusivelyapplicabletothepreparationofmethylestersoffatsandoilsforgasliquidchromatographic(GLC)analysis.Itisapplicabletoallfatsandoilsincludingmilkfatandblendscontainingmilkfat.Isomerizationofunsaturatedfattyacidsonlyoccurstoaminorextentandisomerizedfattyacidsareonlypresentatthedeterminationlimit.Asisomerizationtakesplace,theprocedureisnotrecommendedforconjugatedlinoleicacid(CLA).AsCLAisnotcorrectlyanalysed,thismethodisnotapplicabletothedeterminationofthecompletefattyacidcompositionofmilkfatsamples.Onlyabout70%to80%ofthefreefattyacidsareesterified.Inthecaseofconjugatedcyclopropylandcyclopropenylfattyacids,sidereactionsmayoccur,butthesedonotinterferewiththedeterminationofthefattyacids.NOTEThispartofISO12966isbaseduponGermanStandardMethodC-VI11e(98)(seeReference[8]).
【中国标准分类号】:X14
【国际标准分类号】:67_200_10
【页数】:12P.;A4
【正文语种】:英语