1、Designation:D327013(Reapproved 2021)Standard Test Methods forAnalysis for Fluoride Content of the Atmosphere and PlantTissues(Semiautomated Method)1This standard is issued under the fixed designation D3270;the number immediately following the designation indicates the year oforiginal adoption or,in
2、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 test methods describe the semiautomated proce-dure for the analyses of various types
3、 of samples for thepurpose of determining total fluoride.Since the test methodsincorporate microdistillation of the sample,they may beapplied to any fluoride-containing solution where standards ofidentical composition have been carried through the samesample preparation procedures and have proven to
4、 providequantitative recovery when analyzed by the semiautomatedsystem.Conversely,the methods shall not be applied foranalyses until the applicability has been demonstrated.1.2 In normal use,the procedure can detect 0.1 g/mL of F.The normal range of analysis is from 0.1 to 1.6 g/mL of F.Higher conce
5、ntrations can be analyzed by careful dilution ofsamples with reagent water.If digested samples routinelyexceed 1.6 g/mL of F,the analytical portion of the pumpmanifold can be modified to reduce sensitivity.However,thebest procedure is to analyze a smaller aliquot of the sample.Most accurate results
6、are obtained when the fluoride concen-tration falls in the middle or upper part of the calibration curve.1.3 The values stated in SI units are to be regarded asstandard.The values given in parentheses after SI units areprovided for information only and are not considered standard.1.4 This standard d
7、oes 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.See 8.3,10.2.4,and 10.2
8、.5 for additional precautions.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 World Trade Orga
9、nization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1193 Specification for Reagent WaterD1356 Terminology Relating to Sampling and Analysis ofAtmospheresD3266 Test Method for Automated Separation and Collec-tion of Particulate and Acidic Gaseous Fluoride in t
10、heAtmosphere(Double Paper Tape Sampler Method)D3267 Test Method for Separation and Collection of Par-ticulate and Water-Soluble Gaseous Fluorides in the At-mosphere(Filter and Impinger Method)D3268 Test Method for Separation and Collection of Par-ticulate and Gaseous Fluorides in the Atmosphere(So-d
11、ium Bicarbonate-Coated Glass Tube and ParticulateFilter Method)D3269 Test Methods for Analysis for Fluoride Content ofthe Atmosphere and Plant Tissues(Manual Procedures)(Withdrawn 2010)3D3614 Guide for Laboratories Engaged in Sampling andAnalysis of Atmospheres and Emissions3.Terminology3.1 Definiti
12、onsFor definitions of terms used in thesemethods,see Terminology D1356.4.Summary of Test Methods4.1 These semiautomated methods are based on the distil-lation of hydrogen fluoride(HF)from the sample and subse-quent reaction of the distillate with alizarin fluorine blue-lanthanum nitrate reagent,to f
13、orm a blue complex which ismeasured colorimetrically at 624 nm(1),4or the subsequentmeasurement with a specific ion probe.1These test methods are under the jurisdiction of ASTM Committee D22 on AirQuality and are the direct responsibility of Subcommittee D22.03 on AmbientAtmospheres and Source Emiss
14、ions.Current edition approved Sept.1,2021.Published October 2021.Originallyapproved in 1991.Last previous edition approved in 2013 as D3270 13.DOI:10.1520/D3270-13R21.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book
15、 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.4The boldface numbers in parentheses refer to the references at the end of thismethod.Copyright ASTM International,
16、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.14.2 General,Plant Material:4.2.1 The plant material including leaf samples,washed orunwashed,is dried,and
