1、Designation:D745821Standard Test Method forDetermination of Beryllium in Soil and Sediment UsingAmmonium Bifluoride Extraction and FluorescenceDetection1This standard is issued under the fixed designation D7458;the number immediately following the designation indicates the year oforiginal adoption o
2、r,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 is intended for use in the determinationof beryllium in samples of s
3、oil and sediment.This test methodcan be used for purposes such as environmental remediationprojects where beryllium is a contaminant of concern.It is alsouseful for characterization of levels of beryllium in soil at siteswhere beryllium is in mining or manufacturing applications,and for determinatio
4、n of background levels of beryllium insoil.1.2 This test method assumes that samples of soil orsediment are collected using appropriate and applicable meth-ods.1.3 This test method includes a procedure for extraction(dissolution)of beryllium in dilute ammonium bifluoride,followed by analysis of aliq
5、uots of the extract solution using aberyllium-specific fluorescent dye.1.4For a 500 mg sample,the lower limit of the workingrange is approximately 0.04 mg Be/kg(5 dilution)or 0.1 mgBe/kg(20 dilution).The working range extends to concen-trations of at least 500 mg Be/kg.1.5 No detailed operating inst
6、ructions are provided becauseof differences among various makes and models of suitablefluorometric instruments.Instead,the analyst shall follow theinstructions provided by the manufacturer of the particularinstrument.This test method does not address comparativeaccuracy of different devices or the p
7、recision between instru-ments of the same make and model.1.6 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.7 All observed and calculated values shall conform to theguidelines for significant digits and rounding established in
8、Practice D6026.1.7.1 For purposes of comparing a measured or calculatedvalue(s)with specified limits,the measured or calculatedvalue(s)shall be rounded to the nearest decimal of significantdigits in the specified limit.1.7.2 The procedures used to specify how data are collected/recorded,or calculate
9、d,in this standard are regarded as theindustry standard.In addition,they are representative of thesignificant digits that generally should be retained.The proce-dures used do not consider material variation,purpose forobtaining the data,special purpose studies,or any consider-ations for the users ob
10、jectives;and it is common practice toincrease or reduce significant digits of reported data to becommensurate with these considerations.It is beyond the scopeof this standard to consider significant digits used in analyticalmethods for engineering data.1.8 This standard does not purport to address a
11、ll 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.1.9 This international standard was developed in ac
12、cor-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
13、Standards:2D653 Terminology Relating to Soil,Rock,and ContainedFluidsD1193 Specification for Reagent WaterD1356 Terminology Relating to Sampling and Analysis ofAtmospheresD3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of Soil and Rock as1This test method is
14、under the jurisdiction of ASTM Committee D22 on AirQuality and is the direct responsibility of Subcommittee D22.04 on Workplace AirQuality.Current edition approved Sept.1,2021.Published April 2022.Originallyapproved in 2008.Last previous edition approved in 2014 as D7458 14.DOI:10.1520/D7458-21.2For
15、 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 Co
16、nshohocken,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.1Used in Engineering Design and ConstructionD4753 Guide for Evaluating,Selecting,and Specifying Bal-ances and Standard Masses for Use in Soil,Rock,a
