1、Designation:D787613(Reapproved 2018)Standard Practice forPractice for Sample Decomposition Using MicrowaveHeating(With or Without Prior Ashing)for AtomicSpectroscopic Elemental Determination in PetroleumProducts and Lubricants1This standard is issued under the fixed designation D7876;the number imme
2、diately 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 practi
3、ce covers the procedure for use of microwaveradiation for sample decomposition prior to elemental deter-mination by atomic spectroscopy.1.1.1 Although this practice is based on the use of induc-tively coupled plasma atomic emission spectrometry(ICP-AES)and atomic absorption spectrometry(AAS)as thepr
4、imary measurement techniques,other atomic spectrometrictechniques may be used if lower detection limits are requiredand the analytical performance criteria are achieved.1.2 This practice is applicable to both petroleum productsand lubricants such as greases,additives,lubricating oils,gasolines,and d
5、iesels.1.3 Although not a part of Committee D02s jurisdiction,this practice is also applicable to other fossil fuel products suchas coal,fly ash,coal ash,coke,and oil shale.1.3.1 Some examples of actual use of microwave heating forelemental analysis of fossil fuel products and other materialsare giv
6、en in Table 1.1.3.2 Some additional examples of ASTM methods formicrowave assisted analysis in the non-fossil fuels area areincluded in Appendix X1.1.4 During the sample dissolution,the samples may bedecomposed with a variety of acid mixture(s).It is beyond thescope of this practice to specify appro
7、priate acid mixtures forall possible combinations of elements present in all types ofsamples.But if the dissolution results in any visible insolublematerial,this practice may not be applicable for the type ofsample being analyzed,assuming the insoluble material con-tains some of the analytes of inte
8、rest.1.5 It is possible that this microwave-assisted decomposi-tion procedure may lead to a loss of“volatile”elements such asarsenic,boron,chromium,mercury,antimony,selenium,and/or tin from the samples.Chemical species of the elementsis also a concern in such dissolutions since some species maynot b
9、e digested and have a different sample introductionefficiency.1.6 A reference material or suitable NIST Standard Refer-ence Material should be used to confirm the recovery ofanalytes.If these are not available,the sample should be spikedwith a known concentration of analyte prior to microwavedigesti
10、on.1.7 Additional information on sample preparation proce-dures for elemental analysis of petroleum products and lubri-cants can be found in Practice D7455.1.8 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.9 This standard doe
11、s 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.Specific warning statemen
12、ts are given in Sections 6 and 7.1.10 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
13、Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2C1234 Practice for Preparation of Oils and Oily WasteSamples by High-Pressure,High-Temperature Digestionfor Trace Element Determinations1This practice is under the jurisdiction of ASTM Committee D02 on Pe
14、troleumProducts,Liquid Fuels,and Lubricants and is the direct responsibility of Subcom-mittee D02.03 on Elemental Analysis.Current edition approved April 1,2018.Published June 2018.Originallyapproved in 2013.Last previous edition approved in 2013 as D7876 13.DOI:10.1520/D7876-13R18.2For referenced A
15、STM 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA
16、 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.1 C1347 Practice for Preparation and Dissolution of UraniumMaterials for AnalysisC1463 Practices for Dissolving Glass Containing Radioac-tive and Mixed Waste for