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ASTM Standard offers quality control tool for hydrocarbons.

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June 12, 2009 - Using ASTM International standard D7504, Test Method for Trace Impurities in Monocyclic Aromatic Hydrocarbons by Gas Chromatography and Effective Carbon Number, manufacturers can determine both trace impurities as well as purity of tolulene, mixed xylenes, and p-xylene. Standard is suited for use as aromatic process control, final product quality control, and commodity inspection.

New ASTM Standard Can Be Used as a Quality Control Tool for Hydrocarbons


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



Press release date: June 10, 2009

W. CONSHOHOCKEN, Pa., 10 June 2009-Manufacturers of toluene, mixed xylenes and p-xylene are often required to determine the type and amount of impurities that remain from manufacture. A new ASTM International standard, D7504, Test Method for Trace Impurities in Monocyclic Aromatic Hydrocarbons by Gas Chromatography and Effective Carbon Number, can now be used as an internal quality control tool where these products are produced or used. D7504 was developed by Subcommittee D16.01 on Benzene, Toluene, Xylenes, Cyclohexane and Their Derivatives, part of ASTM International Committee D16 on Aromatic Hydrocarbons and Related Chemicals. According to Committee D16 members Mrs. Zhang Yuhong, head, analytical group, and Mr. Wang Chuan, manager, standardization department, Shanghai Research Institute of Petrochemical and Technology, Sinopec, D7504 can be used to determine both trace impurities as well the purity of toluene, mixed xylenes and p-xylene. "The new standard can be used in an aromatic process control, final product quality control and commodity inspection," said Mrs. Zhang. "Compared with the current existing methods, D7504 is simpler and more convenient," says Mr. Wang. "By using this method, labs can reduce their costs significantly and reduce the operator's exposure to toxic aromatics. This method also helps reduce the difference in results between labs." All interested parties are invited to participate in the activities of D16.01. "We are planning to do an interlaboratory study to determine the reproducibility of D7504 and will be looking for volunteers," says Stuart Smith, chair of Subcommittees D16.05 on Editorial and Nomenclature and D16.06 on Statistical Procedure. "I believe this test method has the potential to significantly reduce costs and analysis time as well as to reduce the variability between laboratories." ASTM International standards are available from Customer Service (phone: 610-832-9585; service@astm.org) or at www.astm.org. For technical information, contact Stuart Smith, Leland, N.C. (phone: 910-371-9555; ssmith@cape-fear.net). ASTM Committee D16 meets June 24-25 in Norfolk, Va. ASTM International welcomes and encourages participation in the development of its standards. ASTM's open consensus process, using advanced Internet-based standards development tools, ensures worldwide access for all interested individuals. For more information on becoming an ASTM member, please contact Christine DeJong, ASTM International (phone: 610-832-9736; cdejong@astm.org). Established in 1898, 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 around the globe.
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