ASTM_D_4298_-_22.pdf

Designation:D429822Standard Guide forIntercomparing Permeation Tubes to Establish Traceability1This standard is issued under the fixed designation D4298;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 This guide covers two procedures for establishing thepermeation rate of a permeation tube and defining the uncer-tainty of the rate by comparison to National Institute ofStandards and Technologys Standard Reference Materials(SRM).1.2 Procedure A consists of a direct comparison of thepermeation rate of the device undergoing calibration with thatof an SRM.1.3 Procedure B consists of a gravimetric calibration pro-cess in which a certified permeation tube is used as a qualitycontrol for the measurements.1.4 Both procedures are limited to the case where a suitablecertified permeation device is available.1.5 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.6 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.(See 8.2 on Safety Precautions.)1.7 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:2D1356 Terminology Relating to Sampling and Analysis ofAtmospheresD3249 Practice for General Ambient Air Analyzer Proce-duresD3609 Practice for Calibration Techniques Using Perme-ation TubesD3631 Test Methods for Measuring Surface AtmosphericPressureE1 Specification for ASTM Liquid-in-Glass ThermometersE319 Practice for the Evaluation of Single-Pan MechanicalBalances(Withdrawn 2021)3E617 Specification for Laboratory Weights and PrecisionMass StandardsE2251 Specification for Liquid-in-Glass ASTM Thermom-eters with Low-Hazard Precision Liquids3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this guide,refer toTerminology D1356.3.2 Definitions of Terms Specific to This Standard:3.2.1 working standarda standard used in the laboratoryor field for periodic standardization of a measuring instrument.4.Summary of Guide4.1 Procedure AA certified SRM permeation source,ob-tained from the National Institute of Standards and Technologyis used to calibrate a continuous analyzer.The analyzer is thenused to measure the concentration of a gaseous mixturegenerated from the permeation tube under calibration.Equa-tions are provided that permit calibration of the permeation rateof the latter from the test data.4.2 Procedure BThe permeation source is calibrated,gravimetrically,using temperature and mass standards trace-able to the United States National Institute of Standards andTechnology(NIST),or other national or international standardreference.The validity of the calibration is confirmed byconcurrently measuring the permeation rate of a certifiedreference material(CRM).5.Significance and Use5.1 The accuracy of air pollution measurements is directlydependent upon accurate calibrations.1This guide is under the jurisdiction of ASTM Committee D22 on Air Qualityand is the direct responsibility of Subcommittee D22.01 on Quality Control.Current edition approved Sept.1,2022.Published September 2022.Originallyapproved in 1983.Last previous edition approved in 2014 as D4298 04(2014)1.DOI:10.1520/D4298-22.2For 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.15.2 Such measurements gain accuracy and can be intercom-pared when the measurement procedures are traceable tonational measurement standards.5.3 This guide describes procedures for enhancing theaccuracy of air pollution measurements which may be specifiedby those organizations requiring traceability to national stan-dards.6.Apparatus6.1 For apparatus u