ASTM_D_3160_-_20a.pdf

Designation:D316020aStandard Test Method forPhenol Content of Cumene(Isopropylbenzene)or AMS(Methylstyrene)1This standard is issued under the fixed designation D3160;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 phenol inrefinedcumene(isopropylbenzene)orAMS(methylstyrene).1.2 This test method has been found applicable in the rangefrom 5 to 50 mg/kg of phenol in refined cumene(isopropyl-benzene)or AMS(methylstyrene).The limit of detection(LOD)is 0.9 mg/kg and the limit of quantitation(LOQ)is2.9 mgkg.NOTE1LOD and LOQ were calculated using intermediate precisionfor the lowest level in the ILS.1.3 The following applies for the purposes of determiningthe conformance of the test results using this test method toapplicable specifications,results shall be rounded off in accor-dance with the rounding-off method of Practice E29.1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.5 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 7.1.6 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:2D1193 Specification for Reagent WaterD3437 Practice for Sampling and Handling Liquid CyclicProductsD6809 Guide for Quality Control and Quality AssuranceProcedures for Aromatic Hydrocarbons and Related Ma-terialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method2.2 Other Document:OSHA Regulations,29 CFR paragraphs 1910.000 and 1910,120033.Summary of Test Method3.1 The phenol content of cumene orAMS is determined bythe color development of phenol with 4-aminoantipyrine.Thesample absorbance is compared to phenol standards at 472 nmon a spectrophotometer.4.Significance and Use4.1 This test method is useful in determining phenol in therange from 5 to 50 mg/kg in commercially available cumene orAMS.4.2 Phenol will inhibit certain reactions involving cumeneor AMS.5.Apparatus5.1 BalanceAny balance capable of measuring weights tothe nearest 0.001 g.1This test method is under the jurisdiction of ASTM Committee D16 onAromatic,Industrial,Specialty and Related Chemicals and is the direct responsi-bility of Subcommittee D16.07 on Styrene,Ethylbenzene and C9 and C10AromaticHydrocarbons.Current edition approved Oct.1,2020.Published October 2020.Originallyapproved in 1991.Last previous edition approved in 2020 as D3160 20.DOI:10.1520/D3160-20A.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.3Available from Superintendent of Documents,U.S.Government PrintingOffice,732 N.Capitol St.NW,Mail Stop:SDE,Washington,DC 20401.,http:/www.access.gpo.gov.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.5.2 SpectrophotometerAny spectrophotometer that canmeasure 0 to 2 absorbance units at 472 nm with a wavelengthrepeatability of 5 nm.5.3 Spectrophotometer Cells,2 cm.5.4 Filter Paper.6.Reagents and Materials6.1 Purity of ReagentsReagent grade chemicals shall beused in all tests.Unless otherwise indicated,it is intended thatall reagents shall conform to the specifications of the Commit-tee on Analytical Reagents of the American Chemical Society,where such specifications are available.4Other grades may beused,provided it is first ascertained that the reagent is ofsufficiently high purity to permit its use without lessening theaccuracy of the determination.6.2 Purity of WaterUnless otherwise indicated,referencesto water shall be understood to mean reagent water as definedby Type I or II of Specification D1193.Type I is the highestpu