1、Designation:D507490(Reapproved 2022)Standard Practice forPreparation of Natural-Matrix Sediment Reference Samplesfor Major and Trace Inorganic Constituents Analysis byPartial Extraction Procedures1This standard is issued under the fixed designation D5074;the number immediately following the designat
2、ion 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 practice covers uniform procedures t
3、o develop,select,collect,prepare,and use oxidized,relatively unpolluted,aquatic natural-matrix bed-sediment reference samples for thecollaborative testing of chemical methods of analysis forsediments and similar materials.Reference samples preparedusing this practice are intended for use as natural
4、sediments,analyzable for major,minor,and trace elements,and generalphysical/organic analyses only.The samples are not designedor tested for environmental pollutants such as trace organiccompounds.1.2 Few,if any,aquatic sediment reference materials havebeen certified,defined,or are even available for
5、 developing orevaluating partial and sequential extraction procedures.Thispractice describes factors and considerations in site selection,sample characteristics,collection,and subsequent raw sampletreatment needed to prepare natural-matrix bed-material sedi-ments for use as partial or sequential ext
6、raction procedurereference test samples.The user of this practice is cautionedthat in light of the many variables that may affect naturalmaterials,neither the list of factors included for evaluation norpreparation of natural-matrix reference samples should beconsidered as all inclusive.It is the use
7、rs responsibility toensure the validity and applicability of these practices forpreparing specific-matrix samples appropriate for testing theconstituents of interest and the operationally defined extractionprocedures utilized.1.3 The values stated in SI units are to be regarded asstandard.No other u
8、nits of measurement are included in thisstandard.1.4 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 applicab
9、ility of regulatory limitations prior to use.1.5 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 W
10、orld Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1129 Terminology Relating to WaterD3974 Practices for Extraction of Trace Elements fromSedimentsD3975 Practice for Development and Use(Preparation)ofSamples for Collaborative Testing of Method
11、s for Analy-sis of SedimentsD3976 Practice for Preparation of Sediment Samples forChemical AnalysisE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this standard,refer toTerminology D11
12、29.3.2 Definitions of Terms Specific to This Standard:3.2.1 natural-matrix sediment,ngranular rock or earthymaterial that has been naturally deposited in or by a waterbody,in which the finer grained material encloses or fills theinterstices between the larger grains or particles of sediment.4.Summar
13、y of Practice4.1 Natural-matrix sediment reference samples of ad-equately defined composition and homogeneity are required forevaluating the accuracy and precision of partial or sequential1This practice is under the jurisdiction of ASTM Committee D19 on Water andis the direct responsibility of Subco
14、mmittee D19.07 on Sediments,Geomorphology,and Open-Channel Flow.Current edition approved May 1,2022.Published May 2022.Originallyapproved in 1990.Last previous edition approved in 2019 as D5074 90(2019)1.DOI:10.1520/D5074-90R22.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcon
15、tact 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 wa
16、s 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.1sediment leachate analyses and test methods.Referencesamples should be typical in all respects to the sample forwhich the test method is applicable.Practically,this is difficultto achieve because of the heterogeneit
