1、Designation:D508620Standard Test Method forDetermination of Calcium,Magnesium,Potassium,andSodium in Atmospheric Wet Deposition by Flame AtomicAbsorption Spectrophotometry1This standard is issued under the fixed designation D5086;the number immediately following the designation indicates the year of
2、original 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.This standard has been approved for use by agencies of the U.S.Department of
3、Defense.1.Scope1.1 This test method is applicable to the determination ofcalcium,magnesium,potassium,and sodium in atmosphericwet deposition(rain,snow,sleet,and hail)by flame atomicabsorption spectrophotometry(FAAS)(1).21.2 The concentration ranges are listed below.The rangetested was confirmed usin
4、g the interlaboratory collaborativetest(see Table 1 for a statistical summary of the collaborativetest).MDL(mg/L)(2)Range of Method(mg/L)Range Tested(mg/L)Calcium0.0090.033.000.1682.939Magnesium0.0030.011.000.0390.682Potassium0.0030.011.000.0290.499Sodium0.0030.012.000.1051.841.3 The method detectio
5、n limit(MDL)as given in 1.2 isbased on single operator precision.Detection limits vary byinstrumentation.Laboratories may be able to achieve lowerdetection limits.The method detection limit for this method asdescribed in 1.2 was determined in 1987(2).1.4 The values stated in SI units are to be regar
6、ded 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 an
7、d deter-mine the applicability of regulatory limitations prior to use.Specific warning statements are given in 8.3,8.7,12.1.8,andSection 9.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Princi
8、ples 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:3D883 Terminology Relating to PlasticsD1129 Terminology Relating to WaterD1193 Specification for Rea
9、gent WaterD1356 Terminology Relating to Sampling and Analysis ofAtmospheresD2777 Practice for Determination of Precision and Bias ofApplicable Test Methods of Committee D19 on WaterD4453 Practice for Handling of High Purity Water SamplesD4691 Practice for Measuring Elements in Water by FlameAtomic A
10、bsorption SpectrophotometryD5012 Guide for Preparation of Materials Used for theCollection and Preservation of Atmospheric Wet Deposi-tionE131 Terminology Relating to Molecular SpectroscopyE275 Practice for Describing and Measuring Performance ofUltraviolet and Visible SpectrophotometersE694 Specifi
11、cation for Laboratory Glass Volumetric Appa-ratusIEEE/ASTM SI-10 Standard for Use of the InternationalSystem of Units(SI):The Modern Metric System2.2 ISO Standard:4ISO 8655 Piston-Operated Volumetric Apparatus Part 2:Piston Pipettes1This test method is under the jurisdiction of ASTM Committee D22 on
12、 AirQuality and is the direct responsibility of Subcommittee D22.03 on AmbientAtmospheres and Source Emissions.Current edition approved March 15,2020.Published April 2020.Originallyapproved in 1990.Last previous edition approved in 2013 as D5086 01(2013).DOI:10.1520/D5086-20.2The boldface numbers in
13、 parentheses refer to a list of references at the end ofthis test method.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 w
14、ebsite.4Available from International Organization for Standardization(ISO),ISOCentral Secretariat,BIBC II,Chemin de Blandonnet 8,CP 401,1214 Vernier,Geneva,Switzerland,http:/www.iso.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis i
15、nternational 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)Co
16、mmittee.3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this test method,referto Terminologies D883,D1129,D1356,E131,and PracticesD4691,E275,and IEEE/ASTM SI-10.3.1.2 method detection limit,MDLthe minimum concen-tration of an analyte that can be reported with 99%confidenceis not a false positive.Laboratories must perform detectionlimit studies or detection limit verification studies at least onceevery 12 months and any time changes to the analytical systemhave occurred which
