ASTM_D_7623_-_20.pdf

Designation:D762320Standard Test Method forTotal Mercury in Crude Oil Using Combustion-GoldAmalgamation and Cold Vapor Atomic Absorption Method1This standard is issued under the fixed designation D7623;the number immediately 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.Scope*1.1 This test method covers the procedures to determine thetotal mercury content in a sample of crude oil.1.2 The test method may be applied to crude oil samplescontaining between 5 ng mL to 400 ng mL of mercury.Theresults may be converted to mass basis,and reported as ng/g ofmercury.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 This work has been published in“Determination ofMercury in Crude Oil by Atomic Spectroscopy.”21.5 WARNINGMercury has been designated by manyregulatory agencies as a hazardous substance that can causeserious medical issues.Mercury,or its vapor,has been dem-onstrated to be hazardous to health and corrosive to materials.Use Caution when handling mercury and mercury-containingproducts.See the applicable product Safety Data Sheet(SDS)for additional information.The potential exists that sellingmercury or mercury-containing products,or both,is prohibitedby local or national law.Users must determine legality of salesin their location.1.6 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.7 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 Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:3D1193 Specification for Reagent WaterD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4175 Terminology Relating to Petroleum Products,LiquidFuels,and LubricantsD4177 Practice for Automatic Sampling of Petroleum andPetroleum ProductsD6299 Practice for Applying Statistical Quality Assuranceand Control Charting Techniques to 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 TestingLaboratoriesD7482 Practice for Sampling,Storage,and Handling ofHydrocarbons for Mercury AnalysisD7622 Test Method for Total Mercury in Crude Oil UsingCombustion and Direct Cold Vapor Atomic AbsorptionMethod with Zeeman Background Correction3.Terminology3.1 For definitions of terms used in this standard,refer toTerminology D4175.4.Summary of Test Method4.1 Controlled heating of the analysis sample in oxygen isused to liberate mercury.The sample is heated to dryness in theinstrument and then thermally(at about 700 C)and chemi-cally decomposed.The decomposition products are carried byflowing treated air to the catalytic section of the furnace(atabout 850 C),where oxidation is completed.The decomposi-tion products are carried to a gold amalgamator that selectivelytraps mercury.After the system is flushed with oxygen to1This 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 June 1,2020.Published June 2020.Originallyapproved in 2010.Last previous edition approved in 2015 as D7623 10(2015).DOI:10.1520/D7623-20.2Nadkarni,R.A.and Hwang,J.D.,“Determination of Mercury in Crude Oil byAtomic Spectroscopy”J.ASTM International,8(5),#1103559,(2011).3For 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.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,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,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.remove any remaining decomposition products other thanmercury,the amalgamator is rapidly heated to about 600 C,releasing mercury