1、Designation: D 5029 98 (Reapproved 2009)Standard Test Method forWater Solubles in Activated Carbon1This standard is issued under the fixed designation D 5029; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revisio
2、n. 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 watersoluble content of (unused) granular and powdered activatedcarbons. Water so
3、lubles are materials that can be extracted bydistilled water under reflux conditions and are expressed as apercentage of dry carbon weight.1.2 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.3 This standard does not purport to
4、 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.2. Referenced Documents2.1 ASTM Standards:2D 1193 Sp
5、ecification for Reagent WaterD 2652 Terminology Relating to Activated CarbonD 2867 Test Methods for Moisture in Activated CarbonD 3838 Test Method for pH of Activated CarbonE 177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE 300 Practice for Sampling Industrial Chemicals3. Te
6、rminology3.1 DefinitionsTerms relating to this standard are definedin Terminology D 2652.4. Summary of Test Method4.1 A known weight of activated carbon is placed into areflux apparatus with Type II reagent water (see SpecificationD 1193). The mixture is refluxed for 15 min under specifiedconditions
7、. This extraction is performed using the method andapparatus described in Test Method D 3838. After extraction,the carbon is separated by filtration and an aliquot of the filtrateis evaporated to dryness. Water solubles are determined byweighing the dry residue and expressing the result as apercenta
8、ge of the dry carbon weight.5. Significance and Use5.1 In certain applications, the ash, color, conductivity, orpH of the finished activated carbon product may be influencedby the quantity of water solubles it contains. This watersolubles test provides a relative indication of the quantity ofsoluble
9、 materials that may be extracted from various activatedcarbons.6. Apparatus and MaterialsNOTE 1All volumetric measuring equipment should meet or exceedthe requirements of National Institute of Standards and TechnologyCircular 602, Testing of Glass Volumetric Apparatus, available from theNational Ins
10、titute of Standards and Technology, Gaithersburg, MD 20899.Volumetric glassware meeting these specifications is generally designatedas Class A.6.1 Flask, 250 mL with 24/40 ST (standard taper) neck.6.2 Condenser, with 24/40 inner ST (standard taper) joint.6.3 Buchner Funnel, 9 or 12.5 cm.6.4 Filter P
11、aper, Ashless,(;5 to 10 m particle retention).6.5 Glass or Porcelain Evaporating Dishes, 100 mL capac-ity.6.6 Analytical Balance, precision 0.1 mg.6.7 Drying Oven.6.8 Desiccator.6.9 Hot Plate.6.10 Pipet,50mL.6.11 Indicating Desiccant.1This test method is under the jurisdiction of ASTM Committee D28
12、onActivated Carbon and is the direct responsibility of Subcommittee D28.02 on LiquidPhase Evaluation.Current edition approved April 1, 2009. Published May 2009. Originallyapproved in 1989. Last previous edition approved in 2004 as D 5029 98 (2004).2For referenced ASTM standards, visit the ASTM websi
13、te, 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.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United State
14、s.6.12 Water, ASTM Type II or better, in accordance withSpecification D 1193, Type II.6.13 Thermometer, approximately 20 to 55C.6.14 Steam Bath, optional.6.15 Beakers, 250 mL.6.16 Graduated Cylinder, 100 mL.6.17 Laboratory Timer.6.18 Filter Flasks, vacuum, 500 mL.7. Sampling7.1 Conducted sampling ac
15、cording to Practice E 300.8. Procedure8.1 Determine the moisture content of the carbon in accor-dance with Test Method D 2867.8.2 Weigh a sample of carbon equivalent to 10.00 6 0.01 gon a dry basis. Remove boiler flask from apparatus (seeBoiler-Reflux Condenser Figure in Test Method D 3838) andadd c
16、arbon sample.8.3 Bring approximately 110 mL of reagent water to a boil.Measure 100.0 6 0.5 mL into a graduated cylinder while thewater is hot. Add a small portion of the 100.0 6 0.5 mL ofwater to wet the carbon. Wash down the sides of the flask withthe remaining portion. Connect the flask to the con
17、denser andplace on a hot plate.8.4 Bring the water to a gentle boil to ensure that no carbonsplashes onto the side of the flask.8.5 Boil gently for 900 6 10 s.8.6 Remove the flask from the hot plate and filter itscontents immediately through the filter paper premoistenedwith the Type II water used f
18、or the test. Catch the filtrate in a500-mL vacuum filter flask, being careful to prevent carbonfines from entering the filtrate.8.7 Cool the filtrate to ambient temperature. (The pH maybe measured on a portion of the filtrate.)8.8 Dry the glass or porcelain evaporating dishes at 150 65C to a constan
19、t weight (60.1 mg). Evaporating dishes mustbe cooled to ambient temperature and stored in a desiccatorbetween weighings. Weigh the dry evaporating dish to thenearest 0.1 mg and record.8.9 Using a pipet, transfer a 50-mL aliquot of the filtrate toa tared glass or porcelain evaporating dish.8.10 Evapo
20、rate the filtrate to dryness in an oven or on asteam bath until the liquid disappears. Avoid boiling to preventloss of residue.8.11 Dry the residue at 150 6 5C for a minimum of1handensure dryness to constant weight (60.1 mg). The evaporatingdish containing the residue must be cooled to ambient tem-p
21、erature and stored in a desiccator between weighings. Weighthe evaporating dish and residue to the nearest 0.1 mg andrecord.8.12 If the residue is less than 10 mg, repeat the procedure.Add the new aliquot during 8.9 to the evaporating dishcontaining residue from the previous aliquot.8.13 Make two de
22、terminations on each carbon sampletested.9. Calculation9.1 The following equation is used for a general calculationof water solubles:Water Solubles, % 5B2A! D! 100!C! E!(1)where:A = mass of evaporating dish, g,B = mass of evaporating dish plus residue, g,C = mass of carbon, g,D = volume of water use
23、d in extraction, mL, andE = volume of aliquot used, mL.9.1.1 As an example, for extraction of one carbon sample,and evaporation of a 50-mL aliquot, the water solublescalculation is:Water Solubles, % 5RWCW3 20010. Report10.1 Report the following:10.1.1 Source of sample.10.1.2 Type or designation of a
24、ctivated carbon.10.1.3 Supplier name.10.1.4 Supplier grade designation.10.1.5 Supplier lot and batch number.10.1.6 Moisture content in accordance with Test MethodD 2867.10.1.7 Water solubles content.10.1.8 Date of test.10.1.9 Name and signature of technician performing test.10.1.10 Name and signatur
25、e of supervisor approving test.11. Precision and Bias11.1 Precision:11.1.1 RepeatabilityRepeatability of this test method is620 % of the average value from three or more determina-tions. This range corresponds to 2S % as defined in PracticeE 177.11.1.2 ReproducibilityReproducibility for this testmet
26、hod is 635 % (2S %) of the calculated value.11.1.3 These statements are based on a round robin trial ofthis test method on activated carbons from five different rawmaterial bases tested by four different laboratories.12. Keywords12.1 activated carbonD 5029 98 (2009)2ASTM International takes no posit
27、ion respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibilit
28、y.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM
29、 International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address s
30、hown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).D 5029 98 (2009)3
