您的位置: 标准下载 » 国际标准 » ISO 国际标准 »

ISO 18252-2006 无水乳脂肪.气液色谱法测定甾醇合成物(常规法)

作者:标准资料网 时间:2024-05-17 15:35:21  浏览:8891   来源:标准资料网
下载地址: 点击此处下载
【英文标准名称】:Anhydrousmilkfat-Determinationofsterolcompositionbygasliquidchromatography(Routinemethod)
【原文标准名称】:无水乳脂肪.气液色谱法测定甾醇合成物(常规法)
【标准号】:ISO18252-2006
【标准状态】:现行
【国别】:国际
【发布日期】:2006-02
【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】:色谱法;乳制品;定义;脂肪;液相色谱法;牛奶;常规试验;甾醇;无水
【英文主题词】:Chromatography;Dairyproducts;Definition;Definitions;Fats;Liquidchromatography;Milk;Routinetests;Sterols;Waterless
【摘要】:ThisInternationalStandardspecifiesaroutinegasliquidchromatographicmethodforthedeterminationofthesterolcompositioninanhydrousmilkfatextractedfromdairyproductsdirectlyontheunsaponifiablematter,ThefirstgoalofthisInternationalStandardisthequantitativeevaluationofcholesterol,whichrepresentsabout98%ofthesterolfractionofpuremilkfat.Moreover,inthecaseofanalysisofmilkfatinamixtureofvegetablefats,thespecifiedprocedureallowstheevaluationofthemostimportantphytosterols.Theprocedurehasbeenvalidatedonmilkfatsamplescontainingapproximately28%to32%ofvegetablefat.Duetotheabsenceofthepurificationstep,whichallowsthecompleteremovalofinterferingcompoundsfromtheunsaponifiablematter,particularcareshouldbetakenwhenapplyingthismethodtotheverificationofthepurityofmilkfatofunknownorigin.Inthecaseofsuspiciousresults,thereferencemethoddescribedinISO12078?IDF159canbeused.
【中国标准分类号】:X16
【国际标准分类号】:67_100_01
【页数】:13P;A4
【正文语种】:英语


下载地址: 点击此处下载
MIL-M-9913B, MILITARY SPECIFICATION, MANUALS, TECHNICAL: INSPECTION, REPAIR AND PACKING INSTRUCTIONS (FOR PARACHUTES) (15 JUL 1982) [S/S BY MIL-M-87929]., This specification covers the preparation of technical manuals for inspection, repair, and packing instruction for personnel, cargo, aerial delivery and aircraft deceleration parachutes.【英文标准名称】:StandardTestMethodforRubberFromNaturalSources-PlasticityRetentionIndex(PRI)
【原文标准名称】:天然橡胶塑性保持指数(PRI)的标准试验方法
【标准号】:ASTMD3194-2004
【标准状态】:现行
【国别】:
【发布日期】:2004
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D11.22
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:合成橡胶;试验;指数;橡胶;炭黑;天然橡胶
【英文主题词】:naturalrubber;plasticity;P.R.I.;retentionindex
【摘要】:Thistestmethodmaybeusedtoevaluatetheheatand/oroxidationstability(aging)ofrawrubberundercontrolledconditions.Highoriginalandagedplasticityvaluesusuallycorrespondtogoodagingproperties.Theratiooftheagedtooriginalplasticityvaluesexpressedasapercentage,thePRI,isusedasanindicationofaging.1.1Thistestmethodgivesanindicationoftheoxidationresistanceofrawnaturalrubberataspecifiedtemperature.ThisresistanceisindicatedbythePlasticityRetentionIndex(PRI),aratioexpressedasapercentageoftheagedplasticitytotheoriginalplasticitydeterminedbymeansofaparallelplateplastometer.AlowPRIvalueindicatesapoorresistancetooxidation.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G34
【国际标准分类号】:
【页数】:3P.;A4
【正文语种】: