MIL-STD-1541A
时间:2024-05-12 06:56:53 来源: 标准资料网 作者：标准资料网 阅读：8436
MIL-STD-1541A, MILITARY STANDARD: ELECTROMAGNETIC COMPATIBILITY REQUIREMENTS FOR SPACE SYSTEMS (30 DEC 1987)., This standard establishes the electromagnetic compatibility requirements for space systems, including frequency management, and the related requirements for the electrical and electronic equipment used in space systems. It also includes requirements designed to establish an effective ground reference for the installed equipment and designed to inhibit adverse electrostatic effects.
【英文标准名称】:StandardTestMethodforVinylandTransUnsaturationinPolyethylenebyInfraredSpectrophotometry
【原文标准名称】:用红外线分光光度法对乙烯基和横相不饱和性的标准试验方法
【标准号】:ASTMD6248-1998(2004)
【标准状态】:现行
【国别】:
【发布日期】:1998
【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】:D20.70
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:红外分光光度法;聚乙烯;横向乙烯集不饱和性;乙烯基不饱和
【英文主题词】:FTIR;infraredspectrophotometry;polyethylene;transvinyleneunsaturation;vinylunsaturation
【摘要】:Therearethreetypesofolefinicgroupspresentinsufficientconcentrationstowarrantconsideration,oneormoreofthatcannormallybefoundinanypolyethylene.Thethreetypesaretrans-vinylene,R-CH=CH-Rx2032;,sometimesreferredtoastrans-internalunsaturation;vinylideneorpendentmethylene,RRx2032;C-CH2;andvinylunsaturation,R-CH=CH2,alsoreferredtoasterminalunsaturation.Thetypeandquantityofthesegroupscaninfluencethechemicalandphysicalpropertiesoftheresin.Informationconcerningtheirpresencemayalsobeusedtocharacterizeoridentifyunknownresinsorblendsofresins.Additivesmayinterferewithunsaturationmeasurements.Theuseiscautionedtodeterminewhichadditivesarepresentandifthereanyabsorbancebandscausedbyadditivepresencethatoverlaporinterferewithunsaturationabsorbancebandsusedinthistestmethodintherangeof1050to850cmx2013;1.Ifoverlappingbandsoccur,themethodisnotapplicable.Interferencefringesresultingfromsmoothsamplesurfacescancausemeasurementerrors.Thistestmethodrequirestheuseofaluminumfoilinthecompressionmoldingofsamplestoprovideanadequatelyroughsurfacetominimizeinterferencefringes.1.1Thistestmethodcoversmosttypesofpolyethylene,thoseethyleneplasticsconsistingofethyleneand-olefincomonomerslongerthanpropylene,andblendsoftheaboveinanyratio.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SpecifichazardsstatementsaregiveninSection8.Note18212;ThereisnosimilarorequivalentISOstandard.
【中国标准分类号】:G16
【国际标准分类号】:83_080_20
【页数】:3P.;A4
【正文语种】:
【英文标准名称】:Ferronickel-Determinationoftrace-elementcontentbyelectrothermalatomicabsorptionspectrometricmethod-Determinationofantimonycontent
【原文标准名称】:镍铁合金.采用电热原子吸收光谱测定法对微量元素含量的测定.第3部分:锑含量测定
【标准号】:BSISO11438-3-1994
【标准状态】:现行
【国别】:英国
【发布日期】:1994-05-15
【实施或试行日期】:1994-05-15
【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】:锑;原子吸收分光光度测定法;控制样品;化学分析和试验;再现性;含量测定;浓度(化学);化学成分;痕量元素分析;镍铁
【英文主题词】:Antimony;Atomicabsorptionspectrometry;Atomicabsorptionspectrophotometry;Chemicalanalysisandtesting;Determinationofcontent;Ferronickel;Ferrousalloys;Nickelalloys;Samplingmethods;Spectrometry;Traceelements
【摘要】:Methodforthedeterminationofantimonyintherange0,0001%(m/m)to0,0005%(m/m)inferronickel.
【中国标准分类号】:H13
【国际标准分类号】:77_100
【页数】:8P.;A4
【正文语种】:英语