1、Designation:D 367 94(Reapproved 2000)e1American Association StateHighway and Transportation Officials StandardAASHTO No.T81Standard Test Method forXylene-Insoluble Matter in Creosote1This standard is issued under the fixed designation D 367;the number immediately following the designation indicates
2、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(e)indicates an editorial change since the last revision or reapproval.e1NOTEKeywords were added editorially in March 2000.1.Scope1.1 Th
3、is test method covers the determination of the xylene-insoluble matter in creosote and creosote-coal tar solution.Since this method is empirical,strict adherence to all details ofthe procedure is necessary for close agreement of resultsamong laboratories.1.1.1 Test Methods D 38 covers the sampling o
4、f woodpreservatives prior to testing.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 to establish appro-priate safety and health practices and determine the applica-bility of regulatory limita
5、tions prior to use.2.Referenced Documents2.1 ASTM Standards:D 38 Test Methods for Sampling Wood Preservatives Priorto Testing2D 370 Test Method for Dehydration of Oil-Type Preserva-tives2D 845 Specification for Five-Degree Xylene33.Summary of Test Method3.1 The sample is digested in hot xylene and f
6、iltered.Theinsoluble matter is washed,dried,and weighed.4.Significance and Use4.1 The test is useful in evaluating and characterizingcreosote and as one element in establishing the uniformity ofshipments and sources of supply.5.Apparatus and Materials5.1 Filtering Crucibles,porcelain with fine-poros
7、ity bottom40-mL capacity,high form,maximum pore diameter,7 m4.5.2 Filter Apparatus,Filter Flask and Tube,with crucibleadapter,and means for producing a vacuum.5.3 Diatomaceous Silica Analytical Filter5,shall be dried toa constant weight at 105C and stored in tightly stopperedcontainer.(Any other gra
8、de of filtering medium should not beused because porosities differ.)5.4 Balance and Weights,accurate to 0.5 mg.5.5 Xylene,five-degree distillation range,conforming toSpecification D 845.5.6 Acetone,boiling at a pressure of 760 mm Hg within arange of 1.0C,which shall include the temperature of 56.1C.
9、6.Preparation of Filter Crucible6.1 Make and record all weighings to the nearest 0.5 mg.6.2 Clean a crucible,if used for less than six determinationsas follows.Remove the mat,wash the crucible with distilledwater,dry and ignite in a muffle furnace for 1 h at about 800C.Cool the crucible slowly to pr
10、event cracking and place it in adesiccator while still warm.6.3 After a crucible has been used for six determinations,remove any residual ash from pores in the filtering area byboiling in 1+1 hydrochloric acid.Then boil the crucible indistilled water,thoroughly back wash with distilled water,dry,and
11、 ignite as above.6.4 Transfer 0.45 to 0.55 g of diatomaceous silica to a clean,filtering crucible,distributing it evenly over the bottom.Dry inan oven at 105 to 110C for 30 min.Cool in a desiccator andweigh.Record the weight of crucible plus diatomaceous silica.7.Procedure7.1 Take the original,undeh
12、ydrated sample and,if neces-sary,heat and stir until any crystalline material is in solutionand the sample is homogeneous.Determine the percentage ofwater in accordance with Test Method D 370.7.2 Weigh the following size sample,into a 100-mL beaker:1This test method is under the jurisdiction of ASTM
13、 Committee D-7 on Woodand is the direct responsibility of Subcommittee D07.06 on Treatments for WoodProducts.Current edition approved April 15,1994.Published June 1994.Originallypublished as D 367 33.Last previous edition D 367 88.This test method is identical in substance with the Standard Method f
14、or theDetermination of the Amount of Material Insoluble in Xylene which is part of theAmerican Wood-Preservers Association Standard Methods of Analysis of Creosoteand Oil Type Preservatives(A1-62).Acknowledgment is made to the AmericanWood Preservers Association for its development of the subject ma
15、tter covered inthis standard.2Annual Book of ASTM Standards,Vol 04.10.3Discontinued;see 1981 Annual Book of ASTM Standards,Part 29.4Selas Grade 01.size FC40,or equivalent has been found satisfactory.5Celite,available from the Arthur H.Thomas Co.,3rd and Vine Sts.,Philadel-phia,PA 19105,has been foun
16、d satisfactory.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.New creosote10 6 1 gUsed creosote5.0 6 0.5 gCreosote solutions2.0 6 0.1 g7.3 Calculate and record the weight of the sample.7.4 Warm 50 mL of xylene to a temperature of 50 to 60C,and immediately add it to the sample while stirring thoroughly.Continue stirring until the sample is dispersed and the bottomof the beaker is clean.Bring the beaker or flask containing thesolution