1、Designation:D735914aStandard Test Method forTotal Fluorine,Chlorine and Sulfur in AromaticHydrocarbons and Their Mixtures by OxidativePyrohydrolytic Combustion followed by IonChromatography Detection(Combustion IonChromatography-CIC)1This standard is issued under the fixed designation D7359;the numb
2、er 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.Scope*1.1 Thi
3、s test method covers the individual determination oftotal fluorine,chlorine and sulfur in aromatic hydrocarbons andtheir mixtures.Samples containing 0.10 to 10 mg/kg of eachelement can be analyzed.1.2 This method can be applied to sample concentrationsoutside the range of the scope by dilution of th
4、e sample in anappropriate solvent to bring the total concentrations of fluorine,chlorine and sulfur within the range covered by the testmethod.However,it is the responsibility of the analyst toverify the solubility of the sample in the solvent and that thediluted sample results conform to the precis
5、ion and accuracy ofthe method.1.2.1 Special considerations must be made in order to attaindetection limits below 1.0 mg/kg in a sample.The instrumentmust be clean and properly maintained to address potentialsources of contamination,or carryover,or both.Multiplesequential injections shall be complete
6、d until a stable back-ground is attained.A stable background is considered to beachieved when the analysis of a minimum of three consecutivesystem blanks have area counts equal to or less than 5%RSDfor the anions of interest.1.3 In determining the conformance of the test results usingthis method to
7、applicable specifications,results shall berounded off in accordance with the rounding-off method ofPractice E29.1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.5 This standard does not purport to address all of thesafety co
8、ncerns,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.See Section 9.2.Referenced Documents2.1 ASTM Standards:2D1193 Specification for Rea
9、gent WaterD3437 Practice for Sampling and Handling Liquid CyclicProductsD3505 Test Method for Density or Relative Density of PureLiquid ChemicalsD6809 Guide for Quality Control and Quality AssuranceProcedures for Aromatic Hydrocarbons and Related Ma-terialsE29 Practice for Using Significant Digits i
10、n Test Data toDetermine Conformance with SpecificationsE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE288 Specification for Laboratory Glass Volumetric FlasksE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodE969 Specification
11、for Glass Volumetric(Transfer)Pipets2.2 Other Documents:OSHA Regulations,29 CFR paragraphs 1910.1000 and1910.120033.Terminology3.1 Definitions:3.1.1 combustion ion chromatography,nan analytical sys-tem consisting of pyrohydrolytic combustion followed by ionchromatographic detection.1This test method
12、 is under the jurisdiction of ASTM Committee D16 onAromatic Hydrocarbons and Related Chemicals and is the direct responsibility ofSubcommittee D16.04 on Instrumental Analysis.Current edition approved Dec.1,2014.Published January 2015.Originallyapproved in 2008.Last previous edition approved in 2014
13、as D7359 14.DOI:10.1520/D7359-14A.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.3Available from U.S.Government P
14、rinting Office Superintendent of Documents,732 N.Capitol St.,NW,Mail Stop:SDE,Washington,DC 20401,http:/www.access.gpo.gov.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.
15、1.2 oxidative pyrohydrolytic combustion,na process inwhich a sample undergoes combustion at temperatures greaterthan 900C in an oxygen rich environment and in the presenceof excess water vapor not originating from the combustion ofthe sample.In oxidative pyrohydrolytic combustion,thesample is pyroly
16、zed into carbon dioxide,water,hydrogenhalides and residual ash;typically elemental oxides.3.1.3 halogens(X),nthe elements fluorine,chlorine,bro-mine and iodine.3.1.4 hydrogen halide(HX),nare inorganic compoundswith the formula HX where X is one of the halogens:fluorine,chlorine,bromine,and iodine.Hydrogen halides are gases thatdissolve in water to give acids.3.1.5 sulfur oxide(SOx),nrefers to one or more of thefollowing compounds:3.1.5.1 sulfur dioxide(SO2)3.1.5.2 sulfur trioxide(SO3)3.1.5.3 sul