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ASTM Standards focus on determination of mercury in crude oils.

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September 30, 2010 - Developed by Subcommittee D02.03 on Elemental Analysis, 2 ASTM International standards provide means to quantitatively determine trace amounts of mercury in crude oils: ASTM D7622, Test Method for Total Mercury in Crude Oil Using Combustion and Direct Cold Vapor Atomic Absorption Method with Zeeman Background Correction, and ASTM D7623, Test Method for Total Mercury in Crude Oil Using Combustion-Gold Amalgamation and Cold Vapor Atomic Absorption Method.

Determination of Mercury in Crude Oil Is Covered in New ASTM Petroleum Standards


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ASTM International
100 Barr Harbor Dr., Box C700
West Conshohocken, PA, 19428-2959
USA



Press release date: September 28, 2010

W. CONSHOHOCKEN, Pa.-Two new ASTM International standards provide means to quantitatively determine the trace amounts of mercury in crude oils. ASTM D7622, Test Method for Total Mercury in Crude Oil Using Combustion and Direct Cold Vapor Atomic Absorption Method with Zeeman Background Correction, and ASTM D7623, Test Method for Total Mercury in Crude Oil Using Combustion-Gold Amalgamation and Cold Vapor Atomic Absorption Method, were developed by Subcommittee D02.03 on Elemental Analysis, part of ASTM International Committee D02 on Petroleum Products and Lubricants.

"Mercury is a contaminant in fossil fuels - both coal and crude oil - and has harmful toxicological effects on both human and marine life," says Kishore Nadkarni, chairman of D02.03. "Emission of mercury during crude oil refining or coal burning during power generation may contaminate refined products as well as the ecosphere."

Nadkarni notes that there are other ASTM International standards for determining mercury in other fossil fuels such as natural gas and coal, including the following:

  • ASTM D5954, Test Method for Mercury Sampling and Measurement in Natural Gas by Atomic Absorption Spectroscopy;

  • ASTM D6350, Test Method for Mercury Sampling and Analysis in Natural Gas by Atomic Fluorescence Spectroscopy;

  • ASTM D3684, Test Method for Total Mercury in Coal by the Oxygen Bomb Combustion/Atomic Absorption Method;

  • ASTM D6414, Test Methods for Total Mercury in Coal and Coal Combustion Residues by Acid Extraction or Wet Oxidation/Cold Vapor Atomic Absorption; and

  • ASTM D6722, Test Method for Total Mercury in Coal and Coal Combustion Residues by Direct Combustion Analysis.

    However, this is the first time standards have been developed for determination of mercury in crude oils.

    "The methods standardized in ASTM D7622 and ASTM D7623 are being used in oil industry laboratories for analysis but were not standardized throughout the industry until now," says David Hwang, vice chairman of D02.03 and Chevron Energy Technology Co. "This standardization should bring uniformity in testing across the industry and facilitate decisions in commerce and regulatory compliance."

    In ASTM D7622, controlled heating following thermal decomposition of the crude oil sample in air is used to liberate mercury. Mercury and all other decomposition products are then atomized at about 750C and are viewed through a cold vapor Zeeman atomic absorption spectrometer.

    In ASTM D7623, a crude oil sample is subjected to heating to about 700C, and the decomposition products are carried in to a gold amalgamator that selectively traps mercury. Later the amalgam is rapidly heated to about 600C, releasing mercury vapor that is viewed by a cold vapor atomic absorption spectrometer.

    To purchase ASTM standards, visit www.astm.org and search by the standard designation number, or contact ASTM Customer Relations (phone: 610-832-9585; service@astm.org). ASTM International welcomes and encourages participation in the development of its standards. For more information on becoming an ASTM member, visit www.astm.org/JOIN.

    ASTM International is one of the largest international standards development and delivery systems in the world. ASTM International meets the World Trade Organization (WTO) principles for the development of international standards: coherence, consensus, development dimension, effectiveness, impartiality, openness, relevance and transparency. ASTM standards are accepted and used in research and development, product testing, quality systems and commercial transactions.

    View this release on the ASTM Web site at www.astmnewsroom.org.

    ASTM Committee D02 Next Meeting: December 5-9, 2010, Jacksonville, Fla.

    Technical Contact: Kishore Nadkarni, Millennium Analytics Inc., East Brunswick, N.J., Phone: 732-613-8710; knadkarni@aol.com; David Hwang, Chevron Energy Technology Co., Richmond, Calif., Phone: 510-242-1785; jdhw@chevron.com

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