1、Designation:D632710(Reapproved 2016)Standard Test Method forDetermination of Radon Decay Product Concentration andWorking Level in Indoor Atmospheres by Active Samplingon a Filter1This standard is issued under the fixed designation D6327;the number immediately following the designation indicates the
2、 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 test method provides instruction for using the grabsa
3、mpling filter technique to determine accurate and reproduc-ible measurements of indoor radon decay product(RDP)concentrations and of the working level value corresponding tothose concentrations.1.2 Measurements made in accordance with this test methodwill produce RDP concentrations representative of
4、 closed-building conditions.Results of measurements made underclosed-building conditions will have a smaller variability andare more reproducible than measurements obtained whenbuilding conditions are not controlled.This test method may beutilized under non-controlled conditions,but a greater degree
5、of variability in the results will occur.Variability in the resultsmay also be an indication of temporal variability present at thesampling site.1.3 This test method utilizes a short sampling period and theresults are indicative of the conditions only at the place andtime of sampling.The results obt
6、ained by this test method arenot necessarily indicative of longer terms of sampling andshould not be confused with such results.The averaging ofmultiple measurements over hours and days can,however,provide useful screening information.Individual measure-ments are generally obtained for diagnostic pu
7、rposes.1.4 The range of the test method may be considered from0.0005 WL to unlimited working levels(WL),and from 40Bq/m3to unlimited for each individual randon decay product.1.5 This test method provides information on equipment,procedures,and quality control.It provides for measurementswithin typic
8、al residential or building environments and maynot necessarily apply to specialized circumstances,forexample,clean rooms.1.6 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.7 This standard does not purport to address all of the
9、safety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.See Section 9 foradditional precautions.2.Referenced Documents2.1 ASTM Sta
10、ndards:2D1356 Terminology Relating to Sampling and Analysis ofAtmospheresD1605 Practices for Sampling Atmospheres for Analysis ofGases and Vapors(Withdrawn 1992)3D3631 Test Methods for Measuring Surface AtmosphericPressureE1 Specification for ASTM Liquid-in-Glass Thermometers3.Terminology3.1 Definit
11、ionsFor definitions of terms used in this testmethod,refer to Terminology D1356.3.2 Definitions of Terms Specific to This Standard:3.2.1 grab samplingthe act and all procedures involvedwith obtaining a short term sample through the use of anoperating air pump.3.2.2 radonthe particular isotope Radon-
12、222.3.2.3 radon decay products(RDP)any or all of the par-ticular isotopes polonium-218,bismuth-214,lead-214,andpolonium-214.3.2.4 working levelquantity of short-lived decay productsthat will result in 1.3 106MeV of potential alpha energy per1This test method is under the jurisdiction of ASTM Committ
13、ee D22 on AirQuality and is the direct responsibility of Subcommittee D22.05 on Indoor Air.Current edition approved April 1,2016.Published April 2016.Originallyapproved in 1998.Last previous edition approved in 2010 as D6327 10.DOI:10.1520/D6327-10R16.2For referenced ASTM standards,visit the ASTM we
14、bsite,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,1
15、00 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 litre of air.The working level is the common unit forexpressing environmental RDP exposure.4.Summary of Test Method44.1 Grab sampling measurements of RDP concentrations inair are performed by collecting the RDP from a kn
16、own volumeof air on a filter and subsequently counting the activity on thefilter following collection.The counting is performed atspecified times for specified periods.The energy from radio-active decay of the particles collected on the filter is convertedto light pulses by a zinc sulfide phosphor in contact with thefilter.The light pulses are detected and converted to counts.Analysis of the number of counts in each counting intervaldetermines the concentrations of the RDP.The two countingmethod
