1、Designation:D682702(Reapproved 2008)Standard Test Method forZinc Analysis of Floor Polishes and Floor Polish PolymersBy Flame Atomic Absorption(A.A.)1This standard is issued under the fixed designation D6827;the number immediately following the designation indicates the year oforiginal adoption or,i
2、n 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 laboratory test method covers the analysis of floorpolishes and floor polish polyme
3、rs for total zinc content.1.2 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 and health practices and determine the applica-bility of regulatory limitations prior
4、 to use.2.Significance and Use2.1 This test method is generally accepted for the prepara-tion of floor polish and floor polish polymers for the analysis oftotal zinc content.Knowing the total zinc content of a floorfinish or polymer can aid in determining the proper disposalmethod of used or unwante
5、d product.3.Apparatus3.1 Analytical Balance,accurate to 0.001 g.3.2 Hot Plate.3.3 Ventilation Hood.4.Reagents and Materials4.1 100 mL Beaker.4.2 1:1 Nitric Acid Solution.4.3 Disposable Pipets.4.4 100-mL Volumetric Flask.4.5 Deionized Water.4.6 Filter Funnel.4.7 Filter Paper.5.Procedure5.1Sample Prep
6、aration:5.1.1 Before a sample can be run for total zinc,it must beprepared so that any insoluble zinc will be solubilized and notremoved by the filtering process.By preparing the sample inthe following way,the analysis will be much more accurate(testing total zinc instead of soluble zinc).The prep m
7、ethodwill also lessen the chance of clogging the nebulizer of theatomic absorption unit with particulate matter.5.2 Prep Method:5.2.1 ImportantAll glassware used must be washed with1:1 nitric acid solution and rinsed with deionized water toeliminate contamination.5.2.2 Weigh approximately 50 g of sa
8、mple into a 100mLbeaker.Record the exact weight to 0.001 g on the analysissheet.5.2.3 Add approximately 5 mL of a 1:1 nitric acid solutionto the beaker.The amount need not be exact.Two disposablepipets worth should be adequate.5.2.4 Heat the sample to boiling in a hood.Allow the sampleto boil until
9、approximately 40 mL of sample remain.5.2.5 Cool the sample and filter into a 100mL volumetricflask.Rinse the beaker and filter into the volumetric flask withdeionized water.5.2.6 Bring the sample to volume with deionized water.5.2.7 Analyze sample by flame A.A.5.3 Sample Analysis:5.3.1 The samples s
10、hould be analyzed using a flame atomicabsorption spectrometer.In absence of this piece of equipment,the prepped samples may be sent to an independent laboratoryfor analysis as long as the following information is recorded:5.3.1.1 Calibration curve(record concentration and absor-bance of standards),5
11、.3.1.2 Analysis of standard at beginning and end of samplerun,5.3.1.3 Blank analysis,5.3.1.4 Sample identification,and5.3.1.5 Date of analysis.6.Precision and Bias6.1 To be determined through round robin inter-laboratoryparticipation.1This test method is under the jurisdiction ofASTM Committee D21 o
12、n Polishesand is the direct responsibility of Subcommittee D21.03 on Chemical and PhysicalTesting.Current edition approved March 1,2008.Published April 2008.Originallyapproved in 2002.Last previous edition approved in 2002 as D6827-02.DOI:10.1520/D6827-02R08.Copyright ASTM International,100 Barr Har
13、bor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 7.Keywords7.1 atomic absorption;floor finish;zincASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard.Users of this standard are expressly
14、advised that determination of the validity of any such patent rights,and the riskof infringement of such rights,are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised,either
15、 reapproved or withdrawn.Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters.Your comments will receive careful consideration at a meeting of theresponsible technical committee,which you may attend.If yo
16、u feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards,at the address shown below.This standard is copyrighted by ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.Individual reprints(single or multiple copies)of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585(phone),610-832-9555(fax),or serviceastm.org(e-mail);or through the ASTM website
