1、Designation:D 2195 05Standard Test Methods forPentaerythritol1This standard is issued under the fixed designation D 2195;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the
2、year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope*1.1 These test methods cover the testing of pentaerythritolfor use in the manufacture of alkyd resins and other syntheticresins.1.2 The test procedures appear in the following s
3、ections:SectionSulfate ash5 to 10Moisture11 to 16Hydroxyl17 to 22Assay(by dibenzal)23 to 29Assay(by gas chromatography)30 to 41Phthalate ester color42 to 491.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 For purposes of d
4、etermining conformance of an ob-served or a calculated value using this test method to relevantspecifications,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 E 29.1.5 Th
5、is 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 and health practices and determine the applica-bility of regulatory limitations prior to use.For specific hazardstate
6、ments,see Section 34.1.6 For hazard information and guidance,see the suppliersMaterial Safety Data Sheet.2.Referenced Documents2.1 ASTM Standards:2D 1193 Specification for Reagent WaterD 1209 Test Method for Color of Clear Liquids(Platinum-Cobalt Scale)D 1615 Test Methods for Glycerol,Ethylene Glyco
7、l,andPentaerythritol in Alkyd Resins3D 1728 Test Method for Phthalate Ester Color of High-Gravity Glycerin3D 2593 Test Method for Butadiene Purity and HydrocarbonImpurities by Gas ChromatographyE 1 Specification for ASTM Liquid-in-Glass ThermometersE 29 Practice for Using Significant Digits in Test
8、Data toDetermine Conformance with SpecificationsE 180 Practice for Determining the Precision of ASTMMethods for Analysis and Testing of Industrial and Spe-cialty ChemicalsE 200 Practice for Preparation,Standardization,and Stor-age of Standard and Reagent Solutions for ChemicalAnalysisE 203 Test Meth
9、od for Water Using Volumetric Karl FischerTitrationE 222 Test Methods for Hydroxyl Groups Using AceticAnhydride AcetylationE 260 Practice for Packed Column Gas Chromatography3.Significance and Use3.1 These test methods provide a measurement of sulfate,ash,moisture(water),hydroxyl content,assay by di
10、benzal andgas chromatography,and phthalate ester color of pentaerythri-tol.The results of these measurements can be used forspecification acceptance.4.Purity of Reagents4.1 Reagent grade chemicals shall be used in all tests.Unless otherwise indicated,it is intended that all reagents shallconform to
11、the specifications of the Committee on AnalyticalReagents of the American Chemical Society,where suchspecifications are available.4Other grades may be used,pro-vided it is first ascertained that the reagent is of sufficientlyhigh purity to permit its use without lessening the accuracy ofthe determin
12、ation.1These test methods are under the jurisdiction of ASTM Committee D01 onPaint and Related Coatings,Materials,and Applications and are the directresponsibility of Subcommittee D01.35 on Solvents,Plasticizers,and ChemicalsIntermediates.Current edition approved May 15,2005.Published May 2005.Origi
13、nallyapproved in 1963.Last previous edition approved in 2000 as D 2195 00.2For 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
14、website.3Withdrawn.4Reagent Chemicals,American Chemical Society Specifications,AmericanChemical Society,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 Ph
15、armacopeiaand National Formulary,U.S.Pharmacopeial Convention,Inc.(USPC),Rockville,MD.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.4.2 Unless otherwise indicated,referen
16、ces to water shall beunderstood to mean Type IV of reagent water conforming toSpecification D 1193.SULFATE ASH5.Summary of Test Method5.1 The organic matter is burned off,the residue treated withsulfuric acid,ignited,and the ash weighed.6.Apparatus6.1 Crucible or DishA silica,quartz,or platinum crucibleor dish having a capacity of 50 to 60 mL.6.2 Bunsen Burner.6.3 Electric Muffle Furnace,maintained at 600 6 25C.7.Reagents and Materials7.1 Sulfuric Acid(1+1)Carefully mix 1 volume of con-centrated
