ASTM_D_2330_-_20.pdf

Designation:D233020Standard Test Method forMethylene Blue Active Substances1This standard is issued under the fixed designation D2330;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 com-pounds that react with methylene blue under the conditionsspecified in the test procedure.They are referred to asmethylene blue active substances(MBAS),and are calculatedand reported in terms of the reference material,linear alkylbenzene sulfonate,LAS.1.2 This test method is applicable for determining MBAS inwater and wastewater.It is the users responsibility to ensurethe validity of this test method for waters of untested matrices.1.3 This test method is a simple,rapid,control proceduresuitable for monitoring the effectiveness of a biodegradation orother linear alkyl benzene sulfonate(LAS)removal process.For greater specificity and interference removal,the pretreat-ment procedure in Annex A1 should be used.Data derivedwithout the pretreatment procedure should be interpreted withcare.This test method is applicable in the range from 0.03 to1.5 mg/L for a 100-mL sample.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 a specific hazard statement,see 8.3.1.6 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:2D459 Terminology Relating to Soaps and Other DetergentsD1129 Terminology Relating to WaterD1193 Specification for Reagent WaterD3370 Practices for Sampling Water from Flowing ProcessStreamsD3856 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)3D5788 Guide for Spiking Organics into Aqueous SamplesD5789 Practice for Writing Quality Control Specificationsfor Standard Test Methods for Organic Constituents(Withdrawn 2002)3D5847 Practice for Writing Quality Control Specificationsfor Standard Test Methods for Water AnalysisE60 Practice for Analysis of Metals,Ores,and RelatedMaterials by SpectrophotometryE131 Terminology Relating to Molecular SpectroscopyE275 Practice for Describing and Measuring Performance ofUltraviolet and Visible Spectrophotometers3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this standard,refer toTerminologies D1129 and E131.3.2 Definitions of Terms Specific to This Standard:3.2.1 alkyl benzene sulfonate(ABS),nthe generic nameapplied to the neutralized product resulting from the sulfona-tion of a branched-chain alkylated benzene.4See also Termi-nology D459.1This 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 Jan.1,2020.Published February 2020.Originallyapproved in 1965.Last previous edition approved in 2002 as D2330 02 which waswithdrawn January 2011 and reinstated in January 2020.DOI:10.1520/D2330-20.2For 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.4For a more complete discussion of terms relating to synthetic detergents andtheir significance,refer to McKinney,R.E.,“Syndets and Waste Disposal,”Sewageand Industrial Wastes,Vol 29,Part 6,June 1957,pp.654666.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.3.2.2 linear alkyl benzene sulfonate(LAS),na form ofalkyl benzene sulfonate(ABS)in which the alkyl group islinear rather than a branched chain.4See also TerminologyD459.4.Summary of Test Method54.1 Th