ASTM D1107-1996(2007) Standard Test Method for Ethanol-Toluene Solubility of Wood《木材的乙醇甲苯可溶性标准试验方法》.pdf

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1、Designation: D 1107 96 (Reapproved 2007)Technical Association of Pulp and Paper IndustryStandard Method T 204 os-76Standard Test Method forEthanol-Toluene Solubility of Wood1This standard is issued under the fixed designation D 1107; the number immediately following the designation indicates the yea

2、r 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 (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers the determination of theethano

3、l-toluene soluble content of wood, which is a measure ofthe waxes, fats, resins, and oils, plus tannins and certain otherether-insoluble components.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 st

4、andard to consult andestablish appropriate safety and health practices and deter-mine the applicability of regulatory limitations prior to use.Specific precautionary statements are given in 4.1.2. Significance and Use2.1 The ethanol-toluene extract of wood consists of thesoluble materials not genera

5、lly considered part of the woodpolymeric structure. They are primarily the waxes, fats, resins,and some gums, as well as some water-soluble substances. Theamounts are influenced by seasoning and drying.3. Apparatus3.1 Filtering Crucibles, Alundum or fritted-glass filteringcrucibles of coarse porosit

6、y.3.2 Extraction ApparatusA compact form of Soxhletextraction apparatus, with ground-glass joints, is preferable.The apparatus shall consist of the following items:3.2.1 Soxhlet Extraction Flask, having a capacity of 250mL.3.2.2 Soxhlet Extraction Tube, 45 to 50 mm in insidediameter, having a capaci

7、ty to the top of the siphon ofapproximately 100 mL and a siphon tube approximately 55mm in height. Extraction tubes of these dimensions siphonmore rapidly than extractors with higher siphon tubes.3.2.3 Condenser, of the Hopkins inner-cooled type.4. Reagent4.1 Ethanol-Toluene SolutionMix 1.0 L absolu

8、te ethanoland 427 mL toluene. (WarningAvoid inhalation of vaporsand contact with skin.)5. Test Specimen5.1 The test specimen shall consist of2gofair-driedsawdust that has been ground to pass a 425-m (40 mesh) sieveand be retained on a 250-m (60 mesh) sieve.6. Procedure6.1 Weigh two 2-g test specimen

9、s in tared Alundum orfritted-glass crucibles. Dry one specimen in an oven for2hat100 to 105C, then place in a loosely stoppered weighingbottle, cool in a desiccator, and weigh. Continue the drying for1-h periods until the weight is constant. Calculate the propor-tions of moisture-free sawdust in the

10、 air-dry specimen.6.2 Place the other specimen in a Soxhlet extraction appa-ratus having a tared Soxhlet extraction flask. Set a small disk offine-mesh screen wire in the top of the crucible to prevent lossof specimen. Extract with 150 mL of ethanol-toluene solutionfor 6 to 8 h, keeping the liquid b

11、oiling briskly. This shouldprovide four to six siphonings per hour.6.3 After evaporating the solvent from the extraction flask,dry the flask and contents in an oven for 1 h at 100 to 105C,cool in a dessicator, and weigh. Continue the drying until thereis no further loss in weight.7. Calculation and

12、Report7.1 Report the results as weight percentage of ethanol-toluene soluble matter in the moisture-free wood, calculated asfollows:Ethanol2toluene soluble matter, % 5 W2/W1P! 3 100 (1)where:W2= weight of dried extract, 6.3,W1= weight of test specimen used in 6.2, andP = proportion of moisture-free

13、wood in the air-dryspecimen (7.1).7.2 The results shall be based on the average of at least twodeterminations.8. Precision and Bias28.1 Data obtained in a round robin test involving fivelaboratories indicate a repeatability of 11 % and a reproduc-ibility of 20 %.1This test method is under the jurisd

14、iction of ASTM Committee D07 on Woodand is the direct responsibility of Subcommittee D07.01 on Fundamental TestMethods and Properties.Current edition approved April 1, 2007. Published April 2007. Originallyapproved in 1950. Last previous edition approved in 2001 as D 1107 96 (2001).2Data for this se

15、ction obtained by the Techncial Association of the Pulp andPaper Industry, P.O. Box 105113, Atlanta, GA 30348.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.8.2 Bias is unknown.9. Keywords9.1 ethanol-toluene; woodASTM International

16、takes no position 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

17、 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, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be add

18、ressed to ASTM 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

19、 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 1107 96 (2007)2