1、Designation:D236379(Reapproved 2019)Standard Test Methods forHydroxypropyl Methylcellulose1This standard is issued under the fixed designation D2363;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number i
2、n parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 These test methods cover the testing of hydroxypropylmethylcellulose.1.2 The test procedures appear in the following order:SectionsMoisture4 to 6As
3、h(as Sulfate)7 to 10Chlorides(as NaCl)11 to 14Alkalinity(as Na2CO3)15 to 18Iron19 to 24Heavy Metals25 to 29Methoxyl Content30 to 35Hydroxypropoxyl Content36 to 41Viscosity42 to 46pH47Solids48 to 51Density52 to 561.3 The values stated in SI units are to be regarded as thestandard.The values given in
4、parentheses are for informationonly.1.4 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 regu
5、latory limitations prior to use.For a specific hazard statement,see 33.5.1.1.5 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 Re
6、com-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D96 Test Method for Water and Sediment in Crude Oil byCentrifuge Method(Field Procedure)(Withdrawn 2000)3E70 Test Method for pH of Aqueous Solutions With theGlass
7、Electrode3.Purity of Reagents3.1 Reagent grade chemicals shall be used in all tests.Unless otherwise indicated,it is intended that all reagents shallconform to the specifications of the Committee on AnalyticalReagents of the American Chemical Society,where suchspecifications are available.4Other gra
8、des 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 determination.3.2 Unless otherwise indicated,references to water shall beunderstood to mean distilled water.MOISTURE4.Scope4.1 This test method cove
9、rs the determination of the volatilecontent of hydroxypropyl methylcellulose and,by commonusage,designated moisture.4.2 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment
10、 of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.5.Procedure5.1 Transfer 2 to 5 g of the sample weighed to the nearest0.01 g to a tared dish(fitted with a lid)and dry for 2 h in anoven at 100 to 105C with lid remo
11、ved.Remove the dish fromthe oven,cover with a lid,cool in a desiccator,and weigh.1These test methods are under the jurisdiction of ASTM Committee D01 onPaint and Related Coatings,Materials,and Applications and are the directresponsibility of Subcommittee D01.36 on Cellulose and Cellulose Derivatives
12、.Current edition approved Dec.1,2019.Published December 2019.Originallyapproved in 1965.Last previous edition approved in 2011 as D2363 79(2011).DOI:10.1520/D2363-79R19.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Bo
13、ok of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4ACS Reagent Chemicals,Specifications and Procedures for Reagents andStandard-Grade Reference Materials,American
14、Chemical Society,Washington,DC.For suggestions on the testing of reagents not listed by the American ChemicalSociety,see Analar Standards for Laboratory Chemicals,BDH Ltd.,Poole,Dorset,U.K.,and the United States Pharmacopeia and National Formulary,U.S.Pharma-copeial Convention,Inc.(USPC),Rockville,M
15、D.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of Internat
16、ional Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.6.Calculation6.1 Calculate the percent of moisture as follows:Moisture,%5A/B!3100(1)where:A=mass loss on heating,andB=sample used,g.ASHAS SULFATE7.Scope7.1 This test method covers the determination of the amountof residue left from igniting a sample of hydroxypropylmethylcellulose after being moistened with sulfuric acid.7.2 This international standard was developed in acco