ASTM_D_2331_-_08_2022.pdf

Designation:D233108(Reapproved 2022)Standard Practices forPreparation and Preliminary Testing of Water-FormedDeposits1This standard is issued under the fixed designation D2331;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 These practices provide directions for the preparation ofthe sample for analysis,the preliminary examination of thesample,and methods for dissolving the analytical sample orselectively separating constituents of concern.1.2 The general practices given here can be applied toanalysis of samples from a variety of surfaces that are subjectto water-formed deposits.However,the investigator mustresort to individual experience and judgement in applying theseprocedures to specific problems.1.3 The practices include the following:SectionsPreparation of the Analytical Sample8Preliminary Testing of the Analytical Sample9Dissolving the Analytical Sample101.4 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.Fora specific warning statement,see Note 2.1.6 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:2D887 Practices for Sampling Water-Formed DepositsD932 Practice for Filamentous Iron Bacteria in Water andWater-Formed DepositsD933 Practice for Reporting Results of Examination andAnalysis of Water-Formed DepositsD934 Practices for Identification of Crystalline Compoundsin Water-Formed Deposits By X-Ray Diffraction(With-drawn 2022)3D1129 Terminology Relating to WaterD1193 Specification for Reagent WaterD1245 Practice for Examination of Water-Formed Depositsby Chemical MicroscopyD2332 Practice for Analysis of Water-Formed Deposits byWavelength-Dispersive X-Ray FluorescenceE11 Specification for Woven Wire Test Sieve Cloth and TestSieves3.Terminology3.1 For definitions of terms used in these practices,refer toTerminology D1129.4.Significance and Use4.1 Deposits in piping from aqueous process streams serveas an indicator of fouling,corrosion or scaling.Rapid tech-niques of analysis are useful in identifying the nature of thedeposit so that the reason for deposition can be ascertained.4.2 Possible treatment schemes can be devised to preventdeposition from reoccurring.4.3 Deposits formed from or by water in all its phases maybe further classified as scale,sludge,corrosion products or1These practices are under the jurisdiction of ASTM Committee D19 on Waterand are the direct responsibility of Subcommittee D19.03 on Sampling Water andWater-Formed Deposits,Analysis of Water for Power Generation and Process Use,On-Line Water Analysis,and Surveillance of Water.Current edition approved July 1,2022.Published July 2022.Originally approvedin 1965.Last previous edition approved in 2013 as D2331 08(2013).DOI:10.1520/D2331-08R22.2For 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.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.1biological deposits.The overall composition of a deposit orsome part of a deposit may be determined by chemical orspectrographic analysis;the constituents actually present aschemical substances may be identified by microscope or X-ray.5.Reagents and Materials5.1 Purity of ReagentsReagent grade chemicals shall beused in all tests.Unless otherwise indicated,it is intended thatall reagents shall conform to specifications of the Committeeon 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 l