ASTM_D_3673_-_89_2016.pdf

Designation:D367389(Reapproved 2016)Standard Test Methods forChemical Analysis of Alpha Olefin Sulfonates1This standard is issued under the fixed designation D3673;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()indicates an editorial change since the last revision or reapproval.1.Scope1.1 These test methods cover the chemical analysis of alphaolefin sulfonates.The analytical procedures appear in thefollowing order:SectionsMoisture by the Distillation Method4 8Sodium Sulfate9 14Neutral Oil15 19Chlorides Calculated as Sodium Chloride(NaCl)20 24Alkalinity25 29pH30 and 31Determination of Color32 37Determination of Active Content by Methylene Blue Titration38 471.2 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 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.For specificprecaution statement see 36.1.Material safety data sheets areavailable for reagents and materials.Review them for hazardsprior to usage.2.Referenced Documents2.1 ASTM Standards:2D1172 Guide for pH of Aqueous Solutions of Soaps andDetergentsD1193 Specification for Reagent WaterD1209 Test Method for Color of Clear Liquids(Platinum-Cobalt Scale)D3049 Test Method for Synthetic Anionic Ingredient byCationic Titration3.Purity of Reagents3.1 Reagent-grade chemicals shall be used in all tests.Unless otherwise indicated,it is intended that all reagents shallconform to the specifications of the Committee on AnalyticalReagents of the American Chemical Society,where suchspecifications are available.3Other grades may be used,pro-vided it is first ascertained that the reagent is of sufficientlyhigh purity to permit its use without lessening the accuracy ofthe determination.3.2 Unless otherwise indicated,references to water shall beunderstood to mean Type III reagent water conforming toSpecification D1193.MOISTURE BY THE DISTILLATIONMETHOD4.Apparatus4.1 The apparatus required shall consist of a glass flaskheated by suitable means and provided with a reflux condenserdischarging into a trap and connected to the flask.Theconnections between the trap and the condenser and flask shallbe interchangeable ground joints.The trap serves to collect andmeasure the condensed water and to return the solvent to theflask.A suitable assembly of the apparatus is illustrated in Fig.1.4.1.1 Flask,1-L capacity,either the short-neck,round-bottom type,or the Erlenmeyer type.4.1.2 Heat SourceEither an oil bath(for example,stearicacid or paraffin wax)or an electric heater provided with asliding rheostat or other means of heat control.4.1.3 CondenserA water-cooled glass reflux condenser(Fig.1),having a jacket approximately 1534in.(400 mm)inlength,with an inner tube38to12in.(9.5 to 12.7 mm)inoutside diameter,and not less than14in.(6.35 mm)in insidediameter.The end of the condenser to be inserted in the trapmay be ground off at an angle of 30 from the vertical axis ofthe condenser.When inserted into the trap,the tip of the1These test methods are under the jurisdiction of ASTM Committee D12 onSoaps and Other Detergents and are the direct responsibility of SubcommitteeD12.12 on Analysis and Specifications of Soaps,Synthetics,Detergents and theirComponents.Current edition approved July 1,2016.Published August 2016.Originallyapproved in 1978.Last previous edition approved in 2009 as D3673 89(2009).DOI:10.1520/D3673-89R16.2For referenced ASTM standards,visit the ASTM website,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.3Reagent 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.Pharmacopeial Convention,Inc.(USPC),Rockville,MD.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 condenser shall be about14in.(7 mm)above the surface of theliquid in the trap after the distillation conditions have beenestablished.Fig.1 shows a conventional sealed-in type ofcondenser,but any other condenser fulfilling the detailedrequirements of this paragraph may be used.4.1.4 TrapFor greatest accuracy several trap sizes areallowable,depending upon the percentage of moisture ex-pected:Moisture Expected,%Size of Trap,mL0 to 5,incl5Over 5 to 17,incl10Over 17 to 30,incl25Over 30 to 50,incl25Over 50 to