ASTM_D_1035_-_94.pdf

Designation:D 1035 94An American National StandardStandard Test Methods forChemical Analysis of Fluor-Chrome-Arsenate-Phenol1This standard is issued under the fixed designation D 1035;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(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 These test methods cover the determination of thechemical analysis of commercial fluor-chrome-arsenatephenol.1.1.1 Test Method D 38 covers the sampling of woodpreservatives prior to testing.1.2 The analytical procedures appear in the following order:SectionsFluorine(calculated as F)6 to 8Arsenic(calculated as As2O5)9 and 10Chromium(calculated as CrO3)11 and 12Dinitrophenol or sodium pentachlorophenate13 and 141.3 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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:D 38 Test Methods for Sampling Wood Preservatives Priorto Testing2D 1033 Methods of Chemical Analysis of Chromated ZincChloride3D 1034 Specification for Fluor-Chrome-Arsenate-Phenol2D 1193 Specification for Reagent Water43.Summary of Test Methods3.1 FluorineFluorine is removed by steam distillationfrom an acidified sample.The distillate is neutralized andtitrated with a standard solution of Thorium Nitrate.Fluorine iscalculated as F.3.2 ArsenicA diluted sample is acidified with Hydrochlo-ric and hypophosphorous acid to precipitate the arsenic.Thearsenic is volatilized by heating in the presence of sulfuric acid,which is then diluted with water and titrated with a standardsolution of Potassium Bromate.Arsenic is calculated asAs2O5.3.3 ChromiumA diluted and chemically treated sample isreacted with an excess of ferrous ammonium sulfate.Theunreacted ferrous ammonium sulfate is titrated with a standardsolution of potassium dichromate to determine the consumedchromium.Hexavalent chromium is calculated as CrO3.3.4 PhenolThe sample is dissolved in water,acidifiedwith sulfuric acid to free the phenolic compounds,and washedwith ether to takeup the phenols.The ether is evaporated andthe residue measured as phenols.4.Significance and Use4.1 Fluor-Chrome-Arsenate-Phenol for use in the preserva-tive treatment of wood must conform with SpecificationD 1034.5.Reagents5.1 Purity of ReagentsReagent grade chemicals shall beused in all tests.Unless otherwise indicated,it is intended thatall reagents shall conform to the specifications of the Commit-tee on Analytical Reagents of the American Chemical Society,where such specifications are available.5Other grades may beused,provided it is first ascertained that the reagent is ofsufficiently high purity to permit its use without lessening theaccuracy of the determination.5.2 Purity of WaterUnless otherwise indicated,referencesto water shall be understood to mean reagent water conformingto Specification D 1193.FLUORINE6.Apparatus6.1 A suitable apparatus for the distillation of fluorine isshown in Fig.1.7.Reagents7.1 Potassium Permanganate Solution(saturated).7.2 Sodium Alizarin Sulfonate IndicatorDissolve 0.05 gof sodium alizarin sulfonate in 100 mL of water.1These test methods are under the jurisdiction of ASTM Committee D-7 onWood and are the direct responsibility of Subcommittee D07.06 on Treatments forWood Products.Current edition approved April 15,1994.Published June 1994.Originallypublished as D 1035 49.Last previous edition D 1035 87.These methods are essentially the same as Sections 2,5,7,and 8 of theAmericanWood-Preservers Association Standard Methods for Analysis of Water-BornePreservatives and Fire-Retardant Formulations(A2-84).Acknowledgment is madeto the American Wood Preservers Association for its development of the subjectmatter covered in this standard.2Annual Book of ASTM Standards,Vol 04.10.3DiscontinuedSee 1992 Annual Book of ASTM Standards,Vol 04.09.4Annual Book of ASTM Standards,Vol 11.01.5Reagent Chemicals,American Chemical Society Specifications,AmericanChemical Society,Washington,DC.For suggestions on the testing of reagents notlisted by the American Chemical Society,see Analar Standards for LaboratoryChemicals,BDH Ltd.,Poole,Dorset,U.K.,and the United States Pharmacopeiaand National Formulary,U.S.Pharmaceutical Convention,Inc.(USPC),Rockville,MD.1Copyright ASTM,100 Barr Harbor Drive,West Conshohocken,PA 19428-2959,United States.NOTICE:This standard has either been superseded and replaced by a new version or discontinued.Contact ASTM International(www.astm.org)for the latest information.7.3 Sodium Hydroxide Solution(20 g/L)Dissolve 2.0 g ofNaOH in 100 mL of water.7.4 Hydrochloric Acid(1+199).7.5 Buffer SolutionDissolve 9.448 g of monochloroaceticacid and 2.0