ASTM_D_1292_-_15_2021e1.pdf

Designation:D129215(Reapproved 2021)1Standard Test Method forOdor in Water1This standard is issued under the fixed designation D1292;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.1NOTEThe WTO caveat was added editorially in December 2021.1.Scope1.1 This test method2covers the determination of the odor(that is,the property that affects the sense of smell)of water.Asuggested system for classifying odors is given as Annex A1.The test method is applicable to the determination of odorintensity in terms of odor intensity index or threshold odornumber.1.2 Effluents may carry a myriad of compounds,difficult tomeasure individually,which contribute to odor problems.Combinations of compounds can cause an odor intensity ordevelop a characteristic that cannot be anticipated from odorsof the individual substances.1.3 Because of the variation in human sensitivity,highprecision in determining odor intensity is not possible.Therewill not always be agreement on odor characteristics by varioustesters.Odor analysis provides the tool to measure variation inodor intensity at a given sampling point.The degree ofvariation may indicate the magnitude or importance of an odorproblem.Determining the cause of the variation or the sourceof the objectionable characteristic may define the odor problembetter than analysis for individual compounds.1.4 The values stated in SI or inch-pound units are to beregarded as the standard.The values given in parentheses arefor information only.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 the warning statementunder 10.1.1.6 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:3D1066 Practice for Sampling SteamD1129 Terminology Relating to WaterD1193 Specification for Reagent WaterD2777 Practice for Determination of Precision and Bias ofApplicable Test Methods of Committee D19 on WaterD3370 Practices for Sampling Water from Flowing ProcessStreams3.Terminology3.1 Definitions:3.1.1 The terms odor-intensity index and odor thresholdnumber in this standard are defined in accordance withTerminology D1129 as follows:3.1.2 odor-intensity index,nthe number of times theconcentration of the original sample is halved by addition ofodor-free water to obtain the least definitely perceptible odor.3.1.3 odor threshold number,nthe greatest dilution of thesample with odor-free water to yield the least definitelyperceptible odor.3.2 For definitions of other terms used in this test method,refer to Terminology D1129.4.Summary of Test Method4.1 A sample of water is diluted with odor-free water untila dilution is obtained that has the least definitely perceptibleodor.The test is made by two or more testers.One makesdilutions and the others determine odor intensity.Samples aretested in generally increasing concentration of odorant,al-though not in consecutive sequence of dilutions,until the odoris perceived.The persons making the test select the odorous1This test method is under the jurisdiction of ASTM Committee D19 on Waterand is the direct responsibility of Subcommittee D19.05 on Inorganic Constituentsin Water.Current edition approved Nov.1,2021.Published December 2021.Originallyapproved in 1953.Last previous edition approved in 2015 as D1292 15.DOI:10.1520/D1292-15R21E01.2This test method is based on a procedure proposed by the Dow Chemical Co.in a private communication.3For 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 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.1?sample from among three flasks,two of which contain odor-free water.Odor is measured without regard to the presence ofsuspended matter or immiscible substances in the sample.Cognizance is ta