1、Designation: D 5029 98 (Reapproved 2004)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 (e) 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 s
3、olubles are materials that can be extracted bydistilled water under reflux conditions and are expressed as apercentage of dry carbon weight.1.2 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 t
4、o 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 Specification for Reagent WaterD 2652 Terminology Relating to Activated CarbonD 2867 Test Method for Moisture in Activated Ca
5、rbonD 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. Terminology3.1 DefinitionsTerms relating to this standard are definedin Terminology D 2652.4. Summary of Test Method4.1 A know
6、n 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. This extraction is performed using the method andapparatus described in Test Method D 3838. After extraction,the carbon is
7、 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 apercentage of the dry carbon weight.5. Significance and Use5.1 In certain applications, the ash, color, conductivity, orpH of the fi
8、nished activated carbon product may be influencedby the quantity of water solubles it contains. This watersolubles test provides a relative indication of the quantity ofsoluble materials that may be extracted from various activatedcarbons.6. Apparatus and MaterialsNOTE 1All volumetric measuring equi
9、pment should meet or exceedthe requirements of National Institute of Standards and TechnologyCircular 602, Testing of Glass Volumetric Apparatus, available from theNational Institute of Standards and Technology, Gaithersburg, MD 20899.Volumetric glassware meeting these specifications is generally de
10、signatedas 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 Paper, Ashless,(;5 to 10 m particle retention).6.5 Glass or Porcelain Evaporating Dishes, 100 mL capac-ity.6.6 Analytical Bal
11、ance, precision 0.1 mg.6.7 Drying Oven.6.8 Desiccator.6.9 Hot Plate.6.10 Pipet,50mL.6.11 Indicating Desiccant.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 Cy
12、linder, 100 mL.6.17 Laboratory Timer.6.18 Filter Flasks, vacuum, 500 mL.7. Sampling7.1 Conducted sampling according to Practice E 300.1This test method is under the jurisdiction of ASTM Committee D28 onActivated Carbon and is the direct responsibility of Subcommittee D28.02 on LiquidPhase Evaluation
13、.Current edition approved Oct. 1, 2004. Published Nov. 2004. Originallyapproved in 1989. Last previous edition approved in 1998 as D 5029 98.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volu
14、me 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 States.8. Procedure8.1 Determine the moisture content of the carbon in accor-dance with Test Method D 2867.8.2 W
15、eigh 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 carbon 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 thewa
16、ter 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 condenser 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
17、 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 for the test. Catch the filtrate in a500-mL vacuum filter flask, being careful to prevent carbonfines from entering the filtrate.8.7
18、 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 constant weight (60.1 mg). Evaporating dishes mustbe cooled to ambient temperature and stored in a desiccatorbetween weighings. Weigh the
19、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 Evaporate the filtrate to dryness in an oven or on asteam bath until the liquid disappears. Avoid boiling to preventloss of residue.8.11
20、 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-perature and stored in a desiccator between weighings. Weighthe evaporating dish and residue to the nearest 0.1 mg andrecord.8.12 If
21、 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 determinations on each carbon sampletested.9. Calculation9.1 The following equation is used for a general calculationof water soluble
22、s: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 used in extraction, mL, andE = volume of aliquot used, mL.9.1.1 As an example, for extraction of one carbon sample,and evaporation of
23、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 activated 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
24、 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 signature of supervisor approving test.11. Precision and Bias11.1 Precision:11.1.1 RepeatabilityRepeatability of this test method is620 % o
25、f 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 testmethod is 635 % (2S %) of the calculated value.11.1.3 These statements are based on a round robin trial ofthis test method on activate
26、d carbons from five different rawmaterial bases tested by four different laboratories.12. Keywords12.1 activated carbonASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressl
27、y advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, e
28、ither reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may atte
29、nd. 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 shown 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 (2004)2
