1、Designation:D430717(Reapproved 2021)Standard Practice forPreparation of Liquid Blends for Use as AnalyticalStandards1This standard is issued under the fixed designation D4307;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year o
2、f last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers a laboratory procedure for thepreparation of small volumes of multicomponent liquid blendsfor use as
3、 analytical standards.1.2 This practice is applicable to components that arenormally liquids at ambient temperature and pressure,or solidsthat will form a solution when blended with liquids.Butanescan be included if precaution is used in blending them.1.3 This practice is limited to those components
4、 that fulfillthe following conditions:1.3.1 They are completely soluble in the final blend.1.3.2 They are not reactive with other blend components orwith blend containers.1.3.3 The combined vapor pressure of the blended compo-nents is such that there is no selective evaporation of any of thecomponen
5、ts.1.3.3.1 The butane content of the blend is not to exceed10%.(WarningExtremely flammable liquefied gas underpressure.Vapor reduces oxygen available for breathing.)Com-ponents with a vapor pressure higher than butanes are not to beblended.1.4 The values stated in SI units are to be regarded as thes
6、tandard.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to
7、use.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers
8、 to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1364 Test Method for Water in Volatile Solvents(KarlFischer Reagent Titration Method)(Withdrawn 2021)33.Summary of Practice3.1 The individual blend components are precisely weighedand combined in an inert,tight-sealing glass vial or
9、similarcontainer.When volatility is a consideration,the componentsof lowest vapor pressure(least volatile)are added first and thehighest(most volatile)last.Mass(weight)percent compositionof the final blend is calculated from the mass and purities of thepure components.Volume percent composition can
10、be calcu-lated using the density of each component.4.Significance and Use4.1 The laboratory preparation of liquid blends of knowncomposition is required to provide analytical standards for thecalibration of chromatographic and other types of analyticalinstrumentation.5.Apparatus5.1 Containers:5.1.1
11、Vial,glass,threaded neck,approximately 22 mLcapacity,short style.Vials of other capacities may be substi-tuted as required.When blending light-sensitive components,use amber glass vials or wrap clear glass vials with black tape.5.1.2 Bottle Cap,molded plastic with TFE-fluorocarbon,polypropylene,or p
12、olyethylene conical liner.5.1.3 Bottle Cap,molded plastic with aluminum foil liner.Aluminum foil liners are preferred to other metal linersbecause they seal better.5.1.4 Mininert Valve,screw cap,20 mm or appropriate sizeto match vial size used.These caps are especially valuable forpreparing blends t
13、hat contain volatile components.1This practice is under the jurisdiction of ASTM Committee D02 on PetroleumProducts,Liquid Fuels,and Lubricants and is the direct responsibility of Subcom-mittee D02.04.0A on Preparation of Standard Hydrocarbon Blends.Current edition approved Oct.1,2021.Published Nove
14、mber 2021.Originallyapproved in 1983.Last previous edition approved in 2017 as D4307 17.DOI:10.1520/D4307-17R21.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the stand
15、ards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with i
16、nternationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1NOTE1The use of Mininert valves is recommended when compo-nents lighter than hexane are contained in the liquid blends.5.2 Balance,capable of weighing to 0.1 mg.5.3 Pipet,dropping,medicine dropper.5.4 Spatula,semi-micro,scoop style.6.Reagents and
