1、Designation:D835122Standard Test Method forDetermination of Trace Elements in Biodiesel and BiodieselBlends by Microwave Plasma Atomic EmissionSpectrometry(MP-AES)1This standard is issued under the fixed designation D8351;the number immediately following the designation indicates the year oforiginal
2、 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 covers the determination of elements inbiodiesel and biod
3、iesel blends by microwave plasma atomicemission spectrometry(MP-AES).The specific elementswithin the scope of this method are calcium(Ca),magnesium(Mg),phosphorus(P),potassium(K),and sodium(Na).1.2 This test method conforms to Practice D6300,subection8.4.5,valid test result range,and subsection 8.4.
4、6,workingrange specifications.The valid test result range and workingrange are recent additions to Practice D6300,and a graphicalrepresentation using example values is shown in Appendix X2,Test Method Operating Range.1.3 Method working range:high expected concentration limit=highest ILS sample meanl
5、ow expected concentration limit=lowest ILS sample mean if:lowest ILS sample mean Rlowest ILS sample mean 0;otherwise it isdetermined by solving for X using the following equation:X RX=coarsest resolution,determined by 0.5*r lowest ILS sample meanBiodiesel and Biodiesel BlendsElementMethod Working Ra
6、nge(expected mg/kg)Calcium0.24 to 15.01Magnesium0.12 to 11.55Phosphorus1.69 to 14.24Potassium0.49 to 13.98Sodium0.90 to 14.301.4 This test method uses organic elemental standards inorganic solvents for calibration and does not purport toquantitatively determine insoluble particulates.Analytical re-s
7、ults are particle size dependent,and particles larger than a fewmicrometers can cause results to appear low.1.5 Elements present at mass fractions above the upper limitof the calibration curves can be determined with additionalappropriate dilutions.Elements shall be measured at thewavelengths presen
8、ted in Table 1.Alternate wavelengths notedin Appendix X1 may be used in the rare case of spectralinterference.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 thesafety conc
9、erns,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.1.8 This international standard was developed in accor-dance with inter
10、nationally 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:2D4057 Pra
11、ctice for Manual Sampling of Petroleum andPetroleum ProductsD4177 Practice for Automatic Sampling of Petroleum andPetroleum ProductsD4307 Practice for Preparation of Liquid Blends for Use asAnalytical StandardsD6299 Practice for Applying Statistical Quality Assuranceand Control Charting Techniques t
12、o Evaluate AnalyticalMeasurement System PerformanceD6300 Practice for Determination of Precision and BiasData for Use in Test Methods for Petroleum Products,Liquid Fuels,and LubricantsD6792 Practice for Quality Management Systems in Petro-leum Products,Liquid Fuels,and Lubricants TestingLaboratories
13、D7372 Guide for Analysis and Interpretation of ProficiencyTest Program Results1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.03 on Elemental Analysis.Current edition approved May 1
14、,2022.Published June 2022.DOI:10.1520/D8351-22.2For 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.Copyright ASTM Inte
15、rnational,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,Guide
16、s and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.12.2 ISO Standards:3ISO 8573-1 Compressed air Part 1:Contaminants andpurity classes3.Terminology3.1 Definitions:3.1.1 biodiesel,nfuel comprised of mono-alkyl esters oflong chain fatty acids derived from vegetable oils or animalfats,designated B100.3.1.2 biodiesel blend(BXX),na homogeneous mixture ofhydrocarbon oils and mono-alkyl esters of long chain fattyacids.3.1.2.1 DiscussionIn the abbrevia