1、Designation:D161707(Reapproved 2012)Standard Test Method forEster Value of Solvents and Thinners1This standard is issued under the fixed designation D1617;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A nu
2、mber 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 U.S.Department of Defense.1.Scope*1.1 This test method covers the determination of the esterv
3、alue of solvents and thinners used in lacquers and othercoatings.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3 For purposes of determining conformance of an ob-served or a calculated value using this test method to rele
4、vantspecifications,test result(s)shall be rounded off“to the nearestunit”in the last right-hand digit used in expressing thespecification limit,in accordance with the rounding-off methodof Practice E29.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its
5、 use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.For a specifichazard statement,see 8.6.1.5 For hazard information and guidance,see the suppliersMaterial Safety Data
6、 Sheet.2.Referenced Documents2.1 ASTM Standards:2D1193 Specification for Reagent WaterE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications3.Summary of Test Method3.1 The specimen is reacted with a measured excess ofaqueous potassium hydroxide,using isopr
7、opanol as a mutualsolvent if necessary.The amount of potassium hydroxideconsumed,which is determined by titrating the excess withstandard mineral acid,is a measure of the ester originallypresent.3.2 Since this determination is based on an acidimetrictitration,a suitable correction should be applied
8、if the acidity ofthe sample exceeds the limit of the specification.4.Significance and Use4.1 This test method is useful in determining the assay ofsolvents and thinners which are esters or solutions of esters ofcarboxylic acid.The ester value is calculated as percent ester.This test method has its g
9、reatest application where the solventor thinner is not a pure ester.This test method may be used inassessing compliance to specification.5.Interferences5.1 Organic chlorides,nitriles,and amides may be hydro-lyzed by the reagent,particularly at 98C,and are a possiblesource of error.Ketones interfere
10、only slightly with thisprocedure.Aldehydes consume some alkali,but the errorintroduced by small amounts is negligible.6.Apparatus6.1 Pressure Bottle,200 to 350-mL capacity,made fromheat-resistant glass.6.2 Container for Pressure BottleA suitable safety deviceto contain the pressure bottle.A metal co
11、ntainer with hingedtop and perforated bottom,a strong synthetic fabric or canvasbag,or a safety shield may be used.6.3 Ampoule,1 or 2-mL capacity.6.4 Weighing Pipet,Lunge or similar type.6.5 Erlenmeyer Flasks,250-mL glass-stoppered.6.6 Buret,50-mL capacity.6.7 Boiling Water Bath.7.Reagents7.1 Purity
12、 of ReagentsReagent grade chemicals shall beused in all tests.Unless otherwise indicated,it is intended thatall reagents shall conform to the specifications of the Commit-tee on Analytical Reagents of the American Chemical Society,1This test method is under the jurisdiction of ASTM Committee D01 on
13、Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.35 on Solvents,Plasticizers,and Chemical Intermediates.Current edition approved July 1,2012.Published September 2012.Originallyapproved in 1958.Last previous edition approved in 2007 as D1617 07.
14、DOI:10.1520/D1617-07R12.2For 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 standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at t
15、he end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 where such specifications are available.3Other grades may beused provided it is first ascertained that the reagent is ofsufficiently high purity to permit its use with
16、out lessening theaccuracy of the determination.7.2 Purity of WaterUnless otherwise indicated,referencesto water shall be understood to mean reagent water conformingto Type IV of Specification D1193.7.3 Hydrochloric Acid,Standard(0.5 N)Prepare 0.5 Nhydrochloric acid(HCl)and standardize to four significantfigures.7.4 Isopropyl Alcohol(99%).7.5 Phenolphthalein Indicator SolutionDissolve 1 g ofphenolphthalein in 100 mL of methanol,ethanol,or isopropylalcohol.7.6 Potassium Hydroxide,Standard Solution