1、Designation:D143915(Reapproved 2022)Standard Test Methods forSodium Carboxymethylcellulose1This standard is issued under the fixed designation D1439;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 sodium car-boxymethylcellulose.1.2 The test procedures appear in the following order:SectionsMoisture4 9Deg
3、ree of Etherification:Test Method AAcid Wash10 17Test Method BNonaqueous Titration10,12,18 23Viscosity24 29Purity30 37Sodium Glycolate38 46Sodium Chloride47 54Density55 611.3 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.4 T
4、his 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 use.For speci
5、fic hazard statements,see 15.1 and 20.1.5 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 Recom-mendations issued by the World Tr
6、ade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1347 Test Methods for Methylcellulose(Withdrawn2003)3E1 Specification for ASTM Liquid-in-Glass Thermometers3.Purity of Reagents3.1 Reagent grade chemicals shall be used in all tests.Unless otherwise
7、indicated,it is intended that all reagents shallconform to the specifications of the Committee on AnalyticalReagents of the American Chemical Society,4where suchspecifications are available.Other grades may be used,pro-vided it is first ascertained that the reagent is of sufficientlyhigh purity to p
8、ermit 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 covers the determination of the volatilecontent of sodium carboxymethylcellulose.4.2 The results of this
9、test are used for calculating the totalsolids in the sample;and,by common usage,all materialsvolatile at this test temperature are designated as moisture.5.Significance and Use5.1 Moisture analysis(along with purity)is used to calculatethe amount of active polymer in the material and must beconsider
10、ed when determining the amount of sodium carboxym-ethylcellulose to use in various formulations.6.Apparatus6.1 OvenGravity convection oven,capable of maintaininga temperature of 105 6 3 C.6.2 Weighing Bottles,low-form,50-mm inside diameter by30-mm height,or equivalent.6.3 Analytical Balance.1These t
11、est 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.Current edition approved June 1,2022.Published June 2022.Originallyapproved in 1956.Last
12、 previous edition approved in 2015 as D1439 15.DOI:10.1520/D1439-15R22.2For 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 web
13、site.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 Chemical Society,Washington,DC.For suggestions on the testing of reagents not listed by the Americ
14、an 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,MD.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.U
15、nited StatesThis international standard was developed in accordance with internationally 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 Barrie
16、rs to Trade(TBT)Committee.17.Procedure7.1 Weigh 3 to 5 g of the sample to the nearest 0.001 g in atared and covered weighing bottle.7.2 Place the bottle in an oven at 105 C for 2 h with thecover removed.Cool the bottle in a desiccator,replace thecover,and weigh.7.3 Replace the sample in the oven for 30 min,cool,andreweigh.7.4 Continue this procedure to a mass loss of not more than5 mg for 30 min drying time.8.Calculation8.1 Calculate the percent moisture,M,as follows:M 5A/B!3100(1)where:A=mass l
