Download or read book Determination of Total Mercury in Crude Oil by Combustion Cold Vapor Atomic Absorption Spectrometry CVAAS written by BS. Fox and published by . This book was released on 2005 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unlike many heavy metals, mercury is a long-range air and water pollutant whose load on the environment is increasing. According to published reports, a major source of atmospheric mercury is the burning of coal for electrical power generation. However, certain crude oils may contain up to several hundred ng/g of total mercury. Accurate analysis of total mercury in crude oil is the first step in determining the value of a crude oil and one's ability to process the material within the refinery, while generating finished products. This paper details the use of Combustion Cold Vapor Atomic Absorption Spectrometry (CVAAS) technology for the analysis of crude samples and distillation cuts. The instrument described in the report is one of several instrument methods currently being evaluated by groups in industry and government. The use of a boat-inlet sample introduction system allows crude oil and other types of material to be analyzed without acid digestion. The strengths and weaknesses of the combustion-CVAAS technique, along with a year's worth of operating experience, will be presented from the user's perspective.

Download or read book Standard Test Method for Total Mercury in Crude Oil Using Combustion and Direct Cold Vapor Atomic Absorption Method with Zeeman Background Correction written by and published by . This book was released on with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Elemental Analysis of Fuels and Lubricants written by R. A. Nadkarni and published by ASTM International. This book was released on 2005 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Standard Test Method for Total Mercury in Crude Oil Using Combustion Gold Amalgamation and Cold Vapor Atomic Absorption Method written by and published by . This book was released on with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Determination of Mercury in Burner Fuels Derived from Waste Mineral Oils written by and published by . This book was released on 2011 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mercury Ultra Trace Analysis written by Dr. Paul Gouda and published by iUniverse. This book was released on 2013-06-19 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dr. Paul H. Ramses Gouda, is a globally renowned chemist who authored several science books and papers. He has been credited with the foundation of several analytical laboratory procedures utilizing Atomic Absorption and Inductively Coupled Plasma for ultra trace analysis of As, Se, Sb &Hg. These Methods were officially adopted by EPL and by other agencies, and as routinely practiced in the scientific arena they were named after him. The author, who first attended medical school before specializing in analytical chemistry and pharmacological research, has acquired two doctorates. His contributions to the scientific community include a recent paper on the unique concept of the duplication and manipulation of neurological compounds to trigger a natural and optimum physiological response. Tour the authors books at and his book-signing sessions at www.goudabooks.com and his science project, scheduled symposiums & seminars at www.optimumgreen.com This book offers a complete coverage of mercury analysis methodology. An analytical laboratory reference, a chemist manual, and a university textbook. A must for every library.

Download or read book Standard Test Method for Total Mercury in Coal and Coal Combustion Residues by Acid Extraction or Wet Oxidation Cold Vapor Atomic Absorption written by and published by . This book was released on with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Determination of Total Mercury in Selected Marine Orgaisms by Cold Vapour Atomic Absorption Spectrophotometry written by United Nations. Environment Programme and published by . This book was released on 1984 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of SW 846 Cold Vapor Mercury Methods 7470 and 7471 written by WF. Beckert and published by . This book was released on 1990 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: The protocols for Methods 7470 and 7471 in the SW-846 methods manual are designed for the cold-vapor atomic absorption spectrometric (CV-AAS) determination of total mercury in aqueous (extracts, wastewater, ground water, etc.) and solid (soils, sediments, sludges, etc.) materials, respectively. Aqueous samples are digested with a combination of nitric and sulfuric acid plus permanganate and persulfate solutions at elevated temperature; solid samples are heated either on a steam bath with aqua regia and permanganate, or in an autoclave with sulfuric acid, nitric acid and permanganate. The mercuric ions in the digests are then reduced with hydroxylamine, and the elemental mercury is aerated into the AAS cell, either in a closed (recirculating) or an open system, where the absorption at 253.7 nm is determined.

Download or read book Comparison of Adsorbed Mercury Screening Method With Cold Vapor Atomic Absorption Spectrophotometry for Determination of Mercury in Soil written by and published by . This book was released on 2000 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Determination of Total Mercury in Marine Sediments and Suspended Solids by Cold Vapour Atomic Absorption Spectrophotometry written by and published by . This book was released on 1985 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Determination of Mercury in Water by Cold Vapor Atomic Absorption Spectrometry written by United States. Environmental Protection Agency. Office of Research and Development and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Determination of total mercury in selected marine organisms by cold vapour atomic absorption spectrophotometry written by Regional Seas Programme (United Nations) and published by . This book was released on 1984 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mercury determination in gasoline by cold vapor and aas with direct reduction in microemulsion written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Foi estudada a determinação de mercúrio em gasolina pela técnica do vapor frio, com redução em meio orgânico e de solução de três componentes (microemulsão). Foram utilizadas várias metodologias empregando a técnica degeração de vapor frio e detecção em espectrômetro de absorção atômica, a saber: determinação direta em gasolina; determinação direta em gasolina estabilizada na forma de microemulsão, com e sem pré-concentração em rede de ouro; edeterminação direta em gasolina estabilizada na forma de microemulsão utilizando uma armadilha para vapores de gasolina antes da pré-concentração em rede de ouro. Analisando os resultados, foi verificado que a determinação de mercúrio em gasolina estabilizada na forma de microemulsão fornece medidas mais repetitivas do que em gasolina in natura; além disso, foi observada anecessidade de utilizar pré-concentração em rede de ouro, devido aos baixos níveis de mercúrio em gasolina; entretanto, foi detectado que os vapores de gasolina envenenam o ouro. Dentre as armadilhas estudadas para evitar o envenenamento do ouro, foi escolhida a armadilha com solução de K2Cr2O7/H2SO4, na qual, os vapores rovenientes do frasco de reação foram borbulhados eo Hg0, oxidado; posteriormente, a solução foi reduzida com SnCl2/ H2SO4 e os vapores enviados para a rede de ouro. Assim, os resultados indicaram que o método para determinação de mercúrio total em gasolina, no qual o mercúrio é reduzido diretamente da gasolina como microemulsão, utilizando armadilha de K2Cr2O7/H2SO4 antes da pré-concentração em ouro, com detecção por CV-AAS, érecomendado. Após uma otimização multivariada, curvas analíticas apresentaram coeficientes de correlação de até 0,9999 com uma massa característica correspondente de 2ng de mercúrio. O limite de detecção obtido por este métodofoi de 0,10 ng/mL (0,14 ng/g).

Download or read book Comparison of Adsorbed Mercury Screening Method with Cold Vapor Atomic Absorption Spectrophotometry for Determination of Mercury in Soil written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-15 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: A field screening method for the determination of elemental mercury in environmental soil samples involves the thermal desorption of the mercury from the sample onto gold and then the thermal desorption from the gold to a gold-film mercury vapor analyzer. This field screening method contains a large number of conditions that could be optimized for the various types of soils encountered. In this study, the conditions were optimized for the determination of mercury in silty clay materials, and the results were comparable to the cold-vapor atomic absorption spectrophotometric method of determination. This paper discusses the benefits and disadvantages of employing the field screening method and provides the sequence of conditions that must be optimized to employ this method of determination on other soil types. Easterling, Donald F. and Hovanitz, Edward S. and Street, Kenneth W. Glenn Research Center NASA/TM-2000-209642, NAS 1.15:209642, E-11973

Download or read book Determination of Low level Mercury by Cold Vapor Generation and Atomic Absorption Spectroscopy written by and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A procedure for determining mercury in liquid samples by cold vapor flameless atomic absorption spectroscopy was developed. The optimum parameter values were determined and mercury standard storage conditions investigated. The effect and tolerance levels of twenty-seven ions, including those ions common to Tank Farm Operations and the Synthetic Wastes, were measured. Standard deviation for the procedure is less than 1%. The procedure can be used to determine mercury at the part per billion level in any liquid sample, a thousand-fold increase in sensitivity over current flame techniques.

Download or read book Methods of Analysis by the U S Geological Survey National Water Quality Laboratory written by John R. Garbarino and published by . This book was released on 2001 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: