1、Designation:D531798(Reapproved 2011)Standard Test Method forDetermination of Chlorinated Organic Acid Compounds inWater by Gas Chromatography with an Electron CaptureDetector1This standard is issued under the fixed designation D5317;the number immediately following the designation indicates the year
2、 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 This test method covers a gas chromatographic proce-dure for th
3、e quantitative determination of selected chlorinatedacids and other acidic herbicides in water.Similar chemicalsmay also be determined by this test method,but it is the usersresponsibility to verify the applicability of this test method toany compounds not listed in this scope.The acid form of thefo
4、llowing compounds were interlaboratory tested using thistest method,and the results were found acceptable:2AnalyteChemical Abstract ServicesRegistry NumberBentazon25057-89-02,4-D94-75-72,4-DB94-82-6DCPA acid metabolites2Dicamba1918-00-93,5-Dichlorobenzoic acid51-36-5Dichlorprop120-36-55-Hydroxydicam
5、ba7600-50-2Pentachlorophenol(PCP)87-86-5Picloram1918-02-12,4,5-T93-76-52,4,5-TP(Silvex)93-72-11.2 This test method may be applicable to the determinationof salts and esters of analyte compounds.The form of each acidis not distinguished by this test method.Results are calculatedand reported for each
6、listed analyte as the total free acid.1.3 This test method has been validated in an interlaboratorytest for reagent water and finished tap water.The analyst shouldrecognize that precision and bias reported in Section 18 maynot be applicable to other waters.1.4 This test method is restricted to use b
7、y or under thesupervision of analysts experienced in the use of gas chroma-tography(GC)and in the interpretation of gas chromatograms.Each analyst must demonstrate the ability to generate accept-able results with this test method using the procedure describedin 19.3.It is the users responsibility to
8、 ensure the validity ofthis test method for waters of untested matrices.1.5 Analytes that are not separated chromatographically,that is,which have very similar retention times,cannot beindividually identified and measured in the same calibrationmixture or water sample unless an alternate technique f
9、oridentification and quantitation exists(16.6,16.7,and 16.8).1.6 When this test method is used to analyze unfamiliarsamples for any or all of the analytes given in 1.1,analyteidentifications must be confirmed by at least one additionalqualitative technique.1.7 The values stated in SI units are to be
10、 regarded as thestandard.The values given in parentheses are for informationonly.1.8 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 deter
11、mine the applica-bility of regulatory limitations prior to use.For specificwarning statements,see Sections 6,8,9,and 10.2.Referenced Documents2.1 ASTM Standards:3D1129 Terminology Relating to WaterD1193 Specification for Reagent WaterD2777 Practice for Determination of Precision and Bias ofApplicabl
12、e Test Methods of Committee D19 on WaterD3370 Practices for Sampling Water from Closed ConduitsD3856 Guide for Management Systems in LaboratoriesEngaged in Analysis of Water1This test method is under the jurisdiction of ASTM Committee D19 on Waterand is the direct responsibility of Subcommittee D19.
13、06 on Methods forAnalysis forOrganic Substances in Water.Current edition approved May 1,2011.Published June 2011.Originallyapproved in 1992.Last previous edition approved in 2003 as D5317 93(2003)1.DOI:10.1520/D5317-98R11.2DCPA monoacid and diacid metabolites are included in the scope of this testme
14、thod;DCPA diacid metabolite is used for validation studies.3For 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.Copyrig
15、ht ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 D4210 Practice for Intralaboratory Quality Control Proce-dures and a Discussion on Reporting Low-Level Data(Withdrawn 2002)4D5789 Practice for Writing Quality Control Specificationsfor Standard Tes
16、t Methods for Organic Constituents(Withdrawn 2002)42.2 EPA Standard:Method 515.1,Revision 4.0,Methods for the Determinationof Organic Compounds in Drinking Water52.3 OSHA Standard:29 CFR 1910 OSHA Safety and Health Standards,GeneralIndustry63.Terminology3.1 DefinitionsFor definitions of terms used in this testmethod,refer to Terminology D1129.3.2 Definitions of Terms Specific to This Standard:3.2.1 internal standarda pure analyte(s)added to a solu-tion in known amount(s)and used to measure the r
