1、Designation:D161306(Reapproved 2012)Standard Test Method forAcidity in Volatile Solvents and Chemical IntermediatesUsed in Paint,Varnish,Lacquer,and Related Products1This standard is issued under the fixed designation D1613;the number immediately following the designation indicates the year oforigin
2、al adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1.
3、Scope*1.1 This test method covers the determination of totalacidity as acetic acid,in concentrations below 0.05%,inorganic compounds and hydrocarbon mixtures used in paint,varnish,and lacquer solvents and diluents.It is known to beapplicable to such mixtures as low molecular weight saturatedand unsa
4、turated alcohols,ketones,ethers,esters,hydrocarbondiluents,naphtha,and other light distillate petroleum fractions.1.2 For purposes of determining conformance of an ob-served value or a calculated value using this test method torelevant specifications,test result(s)shall be rounded off“tothe nearest
5、unit”in the last right-hand digit used in expressingthe specification limit,in accordance with the rounding-offmethod of Practice E29.1.3 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.4 For specific hazard information and gu
6、idance consultsuppliers Material Safety Data Sheet.1.5 This standard does not purport to address the safetyconcerns,if any,associated with its use.It is the responsibilityof whoever uses this standard to consult and establish appro-priate safety and health practices and determine the applica-bility
7、of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D770 Specification for Isopropyl AlcoholD1193 Specification for Reagent WaterE200 Practice for Preparation,Standardization,and Storageof Standard and Reagent Solutions for Chemical AnalysisE29 Practice for Using Signifi
8、cant Digits in Test Data toDetermine Conformance with Specifications3.Summary of Test Method3.1 The specimen is mixed with either an equal volume ofwater or an equal volume of alcohol,and titrated with aqueoussodium hydroxide solution to the phenolphthalein end point.4.Significance and Use4.1 This t
9、est method is useful for determining low levels ofacidity,below 0.05%,in organic compounds and hydrocarbonmixtures.The total acidity is calculated as acetic acid ormilligrams of sodium hydroxide per gram of sample.4.2 Acidity may be present as a result of contamination,decomposition during storage o
10、r distribution,or manufacture.This test method may be used in assessing compliance with aspecification.5.Apparatus5.1 Buret,10-mL,graduated in 0.05-mL subdivisions.5.2 Erlenmeyer Flask,250-mL capacity.6.Purity of Reagents6.1 Reagent grade chemicals shall be used in all tests.Unless otherwise indicat
11、ed,it is intended that all reagents shallconform to the specifications of the Committee on AnalyticalReagents of the American Chemical Society,where suchspecifications are available.3Other grades may be used pro-vided it is first ascertained that the reagent is of sufficientlyhigh purity to permit i
12、ts use without lessening the accuracy ofthe determination.6.2 Unless otherwise indicated,references to water shall beunderstood to mean reagent water conforming to Type IV ofSpecification D1193.1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,a
13、nd Applications and is the direct responsibility ofSubcommittee D01.35 on Solvents,Plasticizers,and Chemical Intermediates.Current edition approved June 1,2012.Published July 2012.Originally approvedin 1964.Last previous edition approved in 2006 as D1613 06.DOI:10.1520/D1613-06R12.2For referenced AS
14、TM 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 standards Document Summary page onthe ASTM website.3Reagent Chemicals,American Chemical Society Specifications,AmericanChemical Society
15、,Washington,DC.For suggestions on the testing of reagents notlisted by the American Chemical Society,see Analar Standards for LaboratoryChemicals,BDH Ltd.,Poole,Dorset,U.K.,and the United States Pharmacopeiaand National Formulary,U.S.Pharmacopeial Convention,Inc.(USPC),Rockville,MD.*A Summary of Cha
16、nges section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 7.Reagents7.1 Alcohols,refined,ethyl or isopropyl.NOTE1Isopropyl alcohol(99%grade)conforming to SpecificationD770,or 190 proof ethyl alcohol conforming to formula No.3A of theU.S.Bureau of Alcohol,Tobacco and Firearms is suitable for use as thesolvent.The use of methyl alcohol is not recommended.7.2 Phenolphthalein Indicator Solution(10 g/L
