ASTM_D_8176_-_18.pdf

Designation:D817618Standard Test Method forMechanically Tapped Density of Activated Carbon(Powdered and Fine Mesh)1This standard is issued under the fixed designation D8176;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.1.Scope1.1 This test method covers the determination of the me-chanically tapped density of powdered and fine mesh activatedcarbon.For the purpose of this test method,“powdered carbon”is defined as having a mean particle diameter less than 45 m,and“fine mesh carbon”is defined as having a particle sizepredominately between 80 and 325 U.S.Standard mesh.1.2 The values in SI units are to be regarded as standard.Noother units of measure are included in this standard.1.3 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.1.4 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:2D2652 Terminology Relating to Activated CarbonD2867 Test Methods for Moisture in Activated CarbonD5158 Test Method for Determination of Particle Size ofPowdered Activated Carbon by Air Jet SievingE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE300 Practice for Sampling Industrial ChemicalsE542 Practice for Calibration of Laboratory VolumetricApparatusE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3.Terminology3.1 DefinitionsSee Terminology D2652.4.Summary of Test Method4.1 The sample of powdered or fine mesh carbon is tappedin a graduated cylinder using a tapping device.The mechani-cally tapped density is determined from the known mass ofpowdered or fine mesh carbon and the tapped volume.5.Significance and Use5.1 This test method is used to determine the densityexpressed in g/mL for powdered or fine mesh carbon.Due tothe nature of the small particles,the density of these carbontypes cannot be measured using the same procedure as granularcarbon.6.Apparatus6.1 CylinderGraduated 100-mL serialized Class A,cali-brated“to contain”(TC),with a base designed to accommodatethe cylinder holder in the tapping device.6.2 Automated Tapping Device3Stroke height 3.0 60.3 mm,250 6 15 strokes min,with built-in adjustable coun-ter capable of delivering 5000 taps.6.3 Analytical Balance,having a sensitivity of 0.1 g orbetter.6.4 Drying Oven,forced-air circulation.7.Procedure7.1 Dry an adequate sample(s)using the procedure de-scribed in Test Methods D2867.1This test method is under the jurisdiction of ASTM Committee D28 onActivated Carbon and is the direct responsibility of Subcommittee D28.02 on LiquidPhase Evaluation.Current edition approved March 1,2018.Published March 2018.Originallyapproved in 2018.DOI:10.1520/D8176-18.2For 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.3ERWEKA GmbH(Ottostr.20-22 63150 Heusenstamm,Germany).The ER-WEKASVM-121/221 tapped density tester has been found suitable for this purpose.Agilent Technologies,Inc.(5301 Stevens Creek Blvd.Santa Clara,CA 95051).The Agilent 350 tapped density tester has been sound suitable for this purpose.Pharma Alliance Group,Inc.(28518 Constellation Road Valencia,CA 91333).The Pharma Alliance TD-1-2 has been found suitable for this purpose.Quantachrome Instruments(1900 Corporate Drive Boynton Beach,FL 33426).TheAutotap and Dualtap tapped density analyzers have been found suitable forthis purpose.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.1 7.2 Tare the empty graduated cylinder on the balance.7.3 Fill the graduated cylinder to 100 mL and weigh to thenearest 0.1 g.Record the mass of the carbon,W.7.4 Place the graduated cylinder into the holder of thetapping device.7.5 Preset the counter to 1000 taps and start the tappingdevice.7.6 When tapping is completed,read the tapped volume,V,to the nea