1、Designation:D846022Standard Test Method forQuantification of Volatile Organic Compounds Using ProtonTransfer Reaction Mass Spectrometry1This standard is issued under the fixed designation D8460;the number immediately following the designation indicates the year oforiginal adoption or,in the case of
2、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 describes a technique of quantifyingthe results from measuring various volatile organ
3、ic compoundcontents using a chemical ionization mass spectrometer result-ing in the production of positively charged target compoundions.Depending on the nature of production of so-calledprimary ions,the associated instruments having the capabilityto perform such analyses are either named Proton Tra
4、nsferReaction Mass Spectrometers(PTR-MS),Selected Ion FlowTube Mass Spectrometers(SIFT-MS)or,in the most genericterm,Mid-pressure chemical ionization mass spectrometers(MPCI-MS).Within this standard,the term PTR-MS is used torepresent any of these instrumentations.1.2 Either of the instrument types
5、can be used with the twomain mass analyzers on the market,that is,with eitherquadrupole(QMS)or time-of-flight(TOFMS)mass analyzer.This method relates only to the quantification portion of theanalysis.Due to large differences in user interfaces andoperating procedures for the instruments of the main
6、instru-ment providers,the specifics on instrument operation are notdescribed in this method.1.3 Details on the theoretical aspects concerning ion pro-duction and chemical reactions are included in this standard asfar as required to understand the quantification aspects andpractical operation of the
7、instrument in the field of vaporintrusion analyses.Specifics on the operation and/or calibrationof the instrument need to be identified by using the usersmanual of the individual instrument vendor.A comprehensivediscussion on the technique including individual mass-lineinterferences and in-depth com
8、parison with alternate methodsare given in multiple publications,such as Yuan et al.(2017)(1)and Dunne et al.(2018)(2)2.1.4 UnitsValues stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.Reporting of test results in units other than SI shallno
9、t be regarded as nonconformance with this standard.1.5 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D6026.1.5.1 The procedures used to specify how data are collected/recorded or calculated in the standard are regarded as
10、 theindustry standard.In addition,they are representative of thesignificant digits that generally should be retained.The proce-dures used do not consider material variation,purpose forobtaining the data,special purpose studies,or any consider-ations for the users objectives;and it is common practice
11、 toincrease or reduce significant digits of reported data to becommensurate with these considerations.It is beyond the scopeof this standard to consider significant digits used in analysismethods for engineering data.1.6 This standard may involve hazardous materials,operations,and equipment.This sta
12、ndard does not purport toaddress all of the safety concerns,if any,associated with itsuse.It is the responsibility of the user of this standard toestablish appropriate safety,health,and environmental prac-tices and determine the applicability of regulatory limitationsprior to use.1.7 This internatio
13、nal 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
14、.2.Referenced Documents2.1 ASTM Standards:3D653 Terminology Relating to Soil,Rock,and ContainedFluidsD1357 Practice for Planning the Sampling of the AmbientAtmosphereD3740 Practice for Minimum Requirements for Agencies1This test method is under the jurisdiction ofASTM Committee D18 on Soil andRock a
15、nd is the direct responsibility of Subcommittee D18.21 on Groundwater andVadose Zone Investigations.Current edition approved May 1,2022.Published June 2022.DOI:10.1520/D8460-222The boldface numbers in parentheses refer to a list of references at the end ofthis standard.3For referenced ASTM standards
16、,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.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 Intern
