ASTM_D_1510_-_21.pdf

Designation:D151021Standard Test Method forCarbon BlackIodine Adsorption Number1This standard is issued under the fixed designation D1510;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 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.Scope1.1 This test method covers the determination of the iodineadsorption number of carbon black.1.1.1 Method A is the original test method for this determi-nation and Method B is an alternate test method usingautomated sample processing and analysis.1.2 The iodine adsorption number of carbon black has beenshown to decrease with sample aging.Iodine Number refer-ence materials have been produced that exhibit stable iodinenumber upon aging.One or more of these reference materialsare recommended for daily monitoring(x-charts)to ensure thatthe results are within the control limits of the individualreference material.Use all Iodine Number reference materialsfrom a set for standardization of iodine testing(see Section 8)when target values cannot be obtained.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.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 regulatory limitations prior to use.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 Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1799 Practice for Carbon BlackSampling PackagedShipmentsD1900 Practice for Carbon BlackSampling Bulk Ship-mentsD4483 Practice for Evaluating Precision for Test MethodStandards in the Rubber and Carbon Black ManufacturingIndustriesD4821 Guide for Carbon BlackValidation of Test MethodPrecision and BiasE969 Specification for Glass Volumetric(Transfer)Pipets2.2 European Standards:3ISO/EN/DIN 8655-3 Piston-operated volumetric apparatus-Part 3:Piston burettes3.Summary of Test Methods3.1 In Test Method A,a weighed sample of carbon black istreated with a portion of standard iodine solution and themixture shaken and centrifuged.The excess iodine is thentitrated with standard sodium thiosulfate solution,and theadsorbed iodine is expressed as a fraction of the total mass ofblack.3.2 In Test Method B,a weighed sample of carbon black istreated with a portion of standard iodine solution using anautomated sample processor where the mixture is stirred,settled and aliquoted for automatic titration.The excess iodineis titrated with standard sodium thiosulfate solution,and theadsorbed iodine is expressed as a fraction of the total mass ofblack.4.Significance and Use4.1 The iodine adsorption number is useful in characterizingcarbon blacks.It is related to the surface area of carbon blacksand is generally in agreement with nitrogen surface area.Thepresence of volatiles,surface porosity,or extractables willinfluence the iodine adsorption number.Aging of carbon blackcan also influence the iodine number.5.Apparatus5.1 Vials,glass,optically clear type,with polyethylenestoppers,45 cm3.1This test method is under the jurisdiction of ASTM Committee D24 on CarbonBlack and is the direct responsibility of Subcommittee D24.21 on Carbon BlackSurface Area and Related Properties.Current edition approved May 1,2021.Published July 2021.Originally approvedin 1957.Last previous edition approved in 2019 as D1510 19a.DOI:10.1520/D1510-21.2For 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.3Available from International Organization for Standardization(ISO),1,ch.dela Voie-Creuse,CP 56,CH-1211 Geneva 20,Switzerland,http:/www.iso.org.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 International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.15.2 Gravity Convection Drying Oven,capable of maintain-ing 125 6 5C.5.3 Buret,either of the following may be used:5.3.1 Digital Buret,25-cm3capacity,with 0.01-cm3incre-ment counter and zero reset control,or