1、Designation:D774217Standard Practice forDetermination of Nonylphenol Polyethoxylates(NPnEO,3#n#18)and Octylphenol Polyethoxylates(OPnEO,2#n#12)in Water by Single Reaction Monitoring(SRM)LiquidChromatography/Tandem Mass Spectrometry(LC/MS/MS)1This standard is issued under the fixed designation D7742;
2、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.Scope
3、1.1 This practice covers the determination of nonylphenolpolyethoxylates(NPnEO,3 n 18)and octylphenol poly-ethoxylates(OPnEO,2 n 12)in water by Single ReactionMonitoring(SRM)Liquid Chromatography/Tandem MassSpectrometry(LC/MS/MS)using direct injection liquid chro-matography(LC)and detected with tand
4、em mass spectrometry(MS/MS)detection.This is a screening practice with qualifiedquantitative data to check for the presence of longer chainethoxylates in a water sample.1.1.1 All data are qualified because neat standards of eachalkylphenol ethoxylate(APEO)are not available and thesynthesis and chara
5、cterization of these neat standards would bevery expensive.The Igepal2brand standards,which contain amixture of various chain lengths of the alkylphenol ethoxylates(APEOs),were used.The mixture was characterized in-houseassuming the instrument response at an optimum electrosprayionization cone and c
6、ollision voltage for each APEO was thesame.This assumption,which may not be accurate,is used todetermine qualified amounts of each ethoxylate in the stan-dards.The n-Nonylphenol diethoxylate(n-NP2EO)surrogatewas available as a neat characterized standard,therefore,thisconcentration and recovery data
7、 was not estimated.APEOs arenot regulated by the EPA,but nonylphenol,a breakdownproduct of NPnEOs,is regulated for fresh and saltwaterdischargers.A request by a sewage treatment plant(STP)wasmade to make this practice available throughASTM in order toscreen for the influent or effluent from sources
8、of APEOscoming into the STP.The interest lies in stopping the source ofthe longer chainAPEOs from entering the STPin order to meeteffluent guidelines.Based upon the above,this is a practicerather than a test method.A comparison between samples ispossible using this practice to determine which has a
9、higherconcentration of APEOs.1.2 UnitsThe values stated in SI units are to be regardedas standard.No other units of measurement are included in thispractice.1.3 The estimated screening range shown in Table 1 wascalculated from the concentration of the Level 1 and 7calibration standards shown in Tabl
10、e 4.These numbers arequalified,as explained in Section 1,and must be reported assuch.Figs.1-5 show the SRM chromatograms of each analyteat the Level 1 concentration with the signal to noise(S/N)ratio.This is a screening practice and method detection limits are notgiven.The S/N ratio for each analyte
11、 at the Level 1 concen-tration must be at least 5:1 for adequate sensitivity.If theinstrument can not meet the criteria,the screening limit mustbe raised to an acceptable level.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibil
12、ity 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.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization est
13、ablished 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:3D1129 Terminology Relating to WaterD1193 Specification for Reagen
14、t WaterD2777 Practice for Determination of Precision and Bias ofApplicable Test Methods of Committee D19 on Water1This 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.Curre
15、nt edition approved Dec.15,2017.Published January 2018.Originallyapproved in 2011.Last previous edition approved in 2011 as D7742 11.DOI:10.1520/D7742-17.2Igepal is a trademark of Rhodia Operations,Aubervilliers,CA.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Cus
16、tomer 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 International Standards,Guides and Recommendations issued by
