ASTM_D_7066_-_04_2011.pdf

Designation:D706604(Reapproved 2011)An American National StandardStandard Test Method fordimer/trimer of chlorotrifluoroethylene(S-316)RecoverableOil and Grease and Nonpolar Material by InfraredDetermination1This standard is issued under the fixed designation D7066;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 test method covers the determination of oil andgrease and nonpolar material in water and wastewater by aninfrared(IR)determination of dimer/trimer of chlorotrifluoro-ethylene(S-316)extractable substances from an acidifiedsample.Included in this estimation of oil and grease are anyother compounds soluble in the solvent.1.2 The method is applicable to measurement of the lightfuel although loss of some light ends during extraction can beexpected.1.3 This method defines oil and grease in water and waste-water as that which is extractable in the test method andmeasured by IR absorption at 2930 cm-1or 3.4 microns.Similarly,this test method defines nonpolar material in waterand wastewater as that oil and grease which is not adsorbed bysilica gel in the test method and measured by IR absorption at2930 cm-1.1.4 This method covers the range of 5 to 100 mg/L and maybe extended to a lower or higher level by extraction of a largeror smaller sample volume collected separately.1.5 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.6 This standard does not purport to address all of thesafety problems,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine(D3856 Guidefor Good Laboratory Practices)the applicability of regulatorylimitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D1129 Terminology Relating to WaterD1193 Specification for Reagent WaterD3370 Practices for Sampling Water from Closed ConduitsD3856 Guide for Management Systems in LaboratoriesEngaged in Analysis of WaterD2777 Practice for Determination of Precision and Bias ofApplicable Test Methods of Committee D19 on WaterD5810 Guide for Spiking into Aqueous SamplesD5847 Practice for Writing Quality Control Specificationsfor Standard Test Methods for Water AnalysisE168 Practices for General Techniques of Infrared Quanti-tative AnalysisE178 Practice for Dealing With Outlying Observations3.Terminology3.1 DefinitionsFor definitions of terms used in this testmethod,refer to Terminology D1129 and Practices E168.3.2 Definitions of Terms Specific to This Standard:3.2.1 oil and greasethe organic matter extracted fromwater or wastewater and measured by this test method.3.2.2 nonpolar materialthe oil and grease remaining insolution after contact with silica gel and measured by this testmethod.3.2.3 solventdimer/trimer of chlorotrifluoroethylene(S-316)4.Summary of Test Method4.1 An acidified 250-mL sample of water or wastewater isextracted serially with three 15-mL volumes of dimer/trimer of1This test method is under the jurisdiction of ASTM Committee D19 on Waterand is the direct responsibility of Subcommittee D19.06 on Methods forAnalysis forOrganic Substances in Water.Current edition approved May 1,2011.Published June 2011.Originallyapproved in 2004.Last previous edition approved in 2004 as D7066 041.DOI:10.1520/D7066-04R11.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 chlorotrifluoroethylene(S-316).The extract is diluted to 50mLand a portion is examined by infrared spectroscopy(IR)for anoil and grease measurement.3A portion of the extract iscontacted with silica gel to remove polar substances,therebyproducing a solution containing nonpolar material.The non-polar material is measured by infrared spectroscopy.5.Significance and Use5.1 The presence and concentration of oil and grease indomestic and industrial wastewater is of concern to the publicbecause of its deleterious aesthetic effect and its impact onaquatic life.5.2 Regulations and standards have been established thatrequire monitoring of oil and grease in water and wastewater.6.Interferences6.1 Soaps,detergents,surfactants and other materials mayform emulsions that may reduce the amount of oil and greaseextracted from a sample.This test method contains proceduresthat can assist the analyst in breaking such emulsions.6.2 Organic compounds and other materials not consideredas oil and grease on the basis of chemical structure may beextracted and measured as oil and grease.Of those mea