ASTM_D_6889_-_03_2017.pdf

Designation:D688903(Reapproved 2017)Standard Practice forFast Screening for Volatile Organic Compounds in WaterUsing Solid Phase Microextraction(SPME)1This standard is issued under the fixed designation D6889;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 This practice covers a procedure for the screening oftrace levels of volatile organic compounds in water samples byheadspace solid phase microextraction(SPME)in combinationwith fast gas chromatography with flame ionization detection.1.2 The results from this screening procedure are used toestimate analyte concentrations to prevent contamination ofpurge and trap or headspace analytical systems.1.3 The compounds of interest must have a greater affinityfor the SPME absorbent polymer or adsorbent than the samplematrix or headspace phase in which they reside.1.4 Not all of the analytes which can be determined bySPME are addressed in this practice.The applicability of theabsorbent polymer,adsorbent or combination to extract thecompound(s)of interest must be demonstrated before use.1.5 Where used it is the responsibility of the user to validatethe application of SPME to the analytes of interest.1.6 The values stated in SI units are to be regarded asstandard.No other units 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 applicability of regulatory limitations prior to use.For specific hazard statements,see 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 Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1129 Terminology Relating to WaterD1193 Specification for Reagent WaterD3694 Practices for Preparation of Sample Containers andfor Preservation of Organic ConstituentsD3856 Guide for Management Systems in LaboratoriesEngaged in Analysis of WaterD4210 Practice for Intralaboratory Quality Control Proce-dures and a Discussion on Reporting Low-Level Data(Withdrawn 2002)3D6520 Practice for the Solid Phase Micro Extraction(SPME)of Water and its Headspace for the Analysis ofVolatile and Semi-Volatile Organic Compounds3.Summary of Practice3.1 This practice employs adsorbent/gas extraction to iso-late compounds of interest,see Practice D6520.An aqueoussample is added to a small(2-mL)septum-sealed vial.Salt isused to improve analyte recovery.After the addition of asurrogate standard and a short mixing cycle,a SPME fusedsilica fiber coated with a thick polymer film is then exposed tothe aqueous headspace for a few seconds.The fiber is thendesorbed in the heated injection port of a gas chromatography/flame ionization detector(GC/FID)or gas chromatography/mass spectrometry(GC-MS)and the resulting analytes chro-matographed on a short narrow bore capillary column.Thetotal analysis time is approximately 3 min.3.2 The concentrations of the volatile organics in the watersample are estimated to determine whether the sample may beanalyzed directly or first diluted prior to purge and trap orheadspace analysis.4.Significance and Use4.1 This practice provides a general procedure for theSPME of volatile organic compounds from the headspace of an1This practice is under the jurisdiction of ASTM Committee D19 on Water andis the direct responsibility of Subcommittee D19.06 on Methods for Analysis forOrganic Substances in Water.Current edition approved Dec.15,2017.Published December 2017.Originallyapproved in 2003.Last previous edition approved in 2011 as D6889 03(2011).DOI:10.1520/D6889-03R17.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright 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 Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 aqueous matrix.Absorbent extraction is used as the initial stepin the extraction of organic constituents for the purpos