1、Designation:D580820Standard Test Method forDetermining Chloride in Aromatic Hydrocarbons andRelated Chemicals by Microcoulometry1This standard is issued under the fixed designation D5808;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revisio
2、n,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 This test method covers the determination of organicchloride in aromatic hydrocarbons,their derivatives,and
3、re-lated chemicals.1.2 This test method is applicable to samples with chlorideconcentrations to 25 mg/kg.The limit of detection(LOD)is 0.2mg/kg and the limit of quantitation(LOQ)is 0.7 mg/kg.Withcareful analytical technique or the measurement of replicates,or both,this method can be used to successf
4、ully analyzeconcentrations below the LOD.NOTE1The maximum is the highest concentration from the inter-laboratory study and the LOD and LOQ were calculated from Perfor-mance Testing Program(PTP)data.See Table 1.1.3 This test method is preferred over Test Method D5194for products,such as styrene,that
5、are polymerized by thesodium biphenyl reagent.1.4 In determining the conformance of the test results usingthis method to applicable specifications,results shall berounded off in accordance with the rounding-off method ofPractice E29.1.5 Organic chloride values of samples containing inorganicchloride
6、s will be biased high due to partial recovery ofinorganic species during combustion.Interference from inor-ganic species can be reduced by water washing the samplebefore analysis.This does not apply to water soluble samples.1.6 The values stated in SI units are to be regarded asstandard.No other uni
7、ts of measurement are included in thisstandard.1.7 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,health,and environmental practices and deter-mine the applicabil
8、ity of regulatory limitations prior to use.For specific hazard statements,see 7.3 and Section 9.1.8 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International St
9、andards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1193 Specification for Reagent WaterD1555M Test Method for Calculation of Volume and Weightof Industrial Aromatic Hydrocarbons and Cyclohexan
10、eMetricD3437 Practice for Sampling and Handling Liquid CyclicProductsD5194 Test Method for Trace Chloride in Liquid AromaticHydrocarbonsD6809 Guide for Quality Control and Quality AssuranceProcedures for Aromatic Hydrocarbons and Related Ma-terialsE29 Practice for Using Significant Digits in Test Da
11、ta toDetermine Conformance with SpecificationsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method2.2 Other Document:OSHA Regulations,29 CFR paragraphs 1910.1000 and1910.120033.Terminology3.1 Definitions:3.1.1 dehydration tube,nchamber containing concen-tr
12、ated sulfuric acid that scrubs the effluent gases from combus-tion to remove water vapor.1This test method is under the jurisdiction of ASTM Committee D16 onAromatic,Industrial,Specialty and Related Chemicals is the direct responsibility ofSubcommittee D16.04 on Instrumental Analysis.Current edition
13、 approved Aug.15,2020.Published August 2020.Originallyapproved in 1995.Last previous edition approved in 2018 as D5808 18.DOI:10.1520/D5808-20.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume
14、 information,refer to the standards Document Summary page onthe ASTM website.3Available from U.S.Government Printing 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 standardCop
15、yright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International
16、 Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.3.1.2 oxidative pyrolysis,na process in which a sample iscombusted in an oxygen-rich atmosphere at high temperatureto break down the components of the sample into elementaloxides.3.1.3 recovery factor,nan indication of the efficiency ofthe measurement computed by dividing the measured value ofa standard by its theoretical value.3.1.4 reference sensor pair,ndetects changes in sil
