1、Designation:E175313Standard Practice forUse of Qualitative Chemical Spot Test Kits for Detection ofLead in Dry Paint Films1This standard is issued under the fixed designation E1753;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the
2、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 practice covers the use of commercial spot test kitsbased on either sulfide or rhodizonate for the qualitative
3、determination of the presence of lead in dry paint films.1.2 This practice may also be used as a qualitative proce-dure for other dry coating films such as varnishes.1.3 This practice provides a list of the advantages andlimitations of chemical spot test kits based on sulfide andrhodizonate to allow
4、 the user to choose the appropriate spot testfor a given circumstance.1.4 This practice contains notes which are explanatory andnot part of mandatory requirements.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the use
5、r of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2E1605 Terminology Relating to Lead in Buildings3.Terminology3.1 For definitions of terms relating to this practic
6、e that donot appear here,refer to Terminology E1605.3.2 Definitions of Terms Specific to This Standard:3.2.1 core samplea fragment of the entire dry paint filmremoved from the substrate with a coring tool which isdesigned to remove a specified area(for example,a squarecentimetre)of dry paint film.3.
7、2.2 negative screena spot test for which a negativeresult indicates a low probability of lead being present in thetest specimen above a predetermined level;for example,aregulated federal or state abatement action level.3.2.3 negative testthe absence of the characteristic colorchange within a specifi
8、ed time limit,usually within a fewminutes.3.2.4 paint chip samplea fragment of a dry paint filmremoved from the substrate.3.2.5 positive testthe observation of the characteristiccolor change within a specified time limit,usually within a fewminutes,although specific procedures for some test kits inc
9、ludeobserving the characteristic color change after an overnightwaiting period.3.2.6 rhodizonate spot test methodfor lead detection,theuse of a dilute solution of rhodizonate ion to test a paintedsurface or paint chip for the qualitative presence of lead(1).33.2.6.1 DiscussionA characteristic color
10、change of thereagent from yellow/orange to pink or red indicates thepresence of lead above the level of detection of the test kit.3.2.7 sulfide spot test methodfor lead detection,the use ofa dilute solution of sulfide ion to test a painted surface or paintchip for the qualitative presence of lead(2)
11、.3.2.7.1 DiscussionA characteristic color change of thereagent from colorless to grey or black indicates the presenceof lead above the level of detection of the spot test.4.Summary of Practice4.1 A dry paint film sample(a painted surface,paint chip,ground paint powder,or core sample)is tested for le
12、adqualitatively through the use of a spot test.Spot tests kits arebased on the reaction of Lead II(Pb2+)ion with either sulfideion(S2)or rhodizonate ion C6O62,resulting in the charac-teristic color change(See 3.2.6 and 3.2.7).4.1.1 Prior to performing the spot test,the dry paint filmsurface is first
13、 cleaned.Except for surface tests,the film is thenprepared by either cutting a notch or an angular cut in situ orby removing a paint chip or core sample.1This practice is under the jurisdiction of ASTM Committee E06 on Perfor-mance of Buildings and is the direct responsibility of Subcommittee E06.23
14、 on LeadHazards Associated with Buildings.Current edition approved Jan.1,2013.Published February 2013.Originallyapproved in 1995.Last previous edition approved in 2004 as E1753 04.DOI:10.1520/E1753-13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service
15、at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The boldface numbers in parentheses refer to a list of references at the end ofthis practice.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Con
16、shohocken,PA 19428-2959.United States1 4.1.2 The test is performed by applying the spot testreagents(directly or with the use of an adsorbent applicator)tothe prepared dry paint sample and observing the characteristiccolor change after a specified time,usually within a fewminutes.4.1.3 An interpretation of the presence or absence of lead inthe dry paint sample is made based on the observation of thepresence or absence of the characteristic color change.5.Significance and Use5.1 This technique is