TITLE

Determination of arsenic in diesel, gasoline and naphtha by graphite furnace atomic absorption spectrometry using microemulsion medium for sample stabilization

AUTHOR(S)
Brandão, Geisamanda Pedrini; De Campos, Reinaldo Calixto; Luna, Aderval Severino; Ribeiro De Castro, Eustáquio Vinicius; De Jesus, Honério Coutinho
PUB. DATE
September 2006
SOURCE
Analytical & Bioanalytical Chemistry;Sep2006, Vol. 385 Issue 8, p1562
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A procedure for the determination of As in diesel, gasoline and naphtha at μg L−1 levels by GFAAS is proposed. Sample stabilization was achieved by the formation of three component solutions prepared by mixing appropriate volumes of the samples propan-1-ol and nitric acid aqueous solution. This mixture resulted in a one-phase medium, which was indefinitely stable. No changes in the analyte signals were observed over several days in spiked samples, proving long-term stabilization ability. The use of conventional (Pd) and permanent (Ir) modification was investigated and the former was preferred. Central composite design multivariate optimization defined the optimum microemulsion composition as well as the temperature program. In this way, calibration using aqueous analytical solutions was possible, since the same sensitivity was observed in the investigated microemulsion media and in 0.2% v/v HNO3. Coefficients of correlation larger than 0.999 and an As characteristic mass of 22 pg were observed. Recoveries ( n=4) obtained from spiked samples were 98±4, 99±3 and 103±5%, and the limits of detection in the original samples were 1.8, 1.2 and 1.5 μg L−1 for diesel, gasoline and naphtha, respectively. Validation was performed by the analysis of a set of commercial samples by independent comparative procedures. No significant difference (Student’s t-test, p<0.05) was observed between comparative and proposed procedure results. The total determination cycle lasted 4 min for diesel and 3 min for gasoline and naphtha, equivalent to a sample throughput of 7 h−1 for diesel and 10 h−1 for gasoline and naphtha.
ACCESSION #
21857572

 

Related Articles

  • Evaluation of the Ignition of Diesel Fuels on Hot Surfaces. Shaw, Alan; Epling, William; McKenna, Christy; Weckman, Beth // Fire Technology;Apr2010, Vol. 46 Issue 2, p407 

    Hot surfaces are known ignition sources for flammable and combustible liquid fuels released from motor vehicles. In automobile fires, this has been termed hot surface ignition (HSI). It can occur on any heated vehicle component including the exhaust manifold and catalytic converter. In this...

  • The densities and reaction heat of methanol synthesis System from cornstalk syngas. Zhu, Ling-feng; Zhao, Qing-ling; Chen, Jing; Zhang, Le; Zhang, Run-tao; Liu, Li-li; Zhang, Zhao-yue // AIP Conference Proceedings;11/25/2010, Vol. 1251 Issue 1, p225 

    Methanol can be used as possibole replacement for conventional gasoline and Diesel fuel. In order to produce methanol, it is necessary to decompose biomass, including cornstalks, which is a raw material from agricultural residues. A promising route for processing cornstals is made cornstalks...

  • OIL SUPPLY AND TRADE Trade--Tables C1-C6.  // Oil, Gas, Coal & Electricity -- Quarterly Statistics -- Electric;2005, Vol. 2005 Issue 4, p191 

    Presents several charts on oil supply and trade from 2002 to 2005, including total naphtha imports, total gasoline exports and total diesel imports.

  • Biobutanol: a Viable Gasoline Substitute through ABE Fermentation. Ranjan, Amrita; Moholkar, V. S. // Proceedings of World Academy of Science: Engineering & Technolog;Mar2009, Vol. 51, p497 

    Biobutanol has recently emerged as a potential alternate liquid fuel for gasoline and diesel. It overcomes many problems associated with conventional alternate liquid fuels such as methanol, ethanol and biodiesel. This review presents techno-economic assessment of the Biobutanol and the process...

  • Petroleum's Long Good-bye. Bullis, Kevin // Technology Review;Nov/Dec2009, Vol. 112 Issue 6, p60 

    The article focuses on the forecast of fuels for the next decade. It is said that liquid hydrocarbons including jet fuel, diesel and gasoline will still be the choice for fuel because they are quick in refueling, good for long distance and cheaper. Daniel Sperling , director of the Institute for...

  • Global Oil Products Price Outlook.  // USA Freight Transport Report;Q1 2011, Issue 1, p27 

    The article presents an outlook on the price of global oil products. It discusses the impact of fuel-efficiency efforts and the increasing use of diesel on gasoline stocks and prices. It outlines the forecast of the U.S. Energy Information Administration (EIA) on heating oil consumption in 2010....

  • Essar refinery goes on stream.  // Chemical Business;Dec2006, Vol. 20 Issue 12, p60 

    The article reports on the decision of Essar Oil to start its operations in its refinery in Vadinar, India. It was commenced with a trial production of 7.5 million tons of crude every year. Included among the chemicals that will be produced in the plant are petrol, diesel, liquefied petroleum...

  • Combined isomerization of overhead cuts of straight-run naphtha and reformate. Ty, Nguen // Chemistry & Technology of Fuels & Oils;Jul2008, Vol. 44 Issue 4, p215 

    Technology was developed for combined isomerization of IBP-85°C overhead cuts of straight-run naphtha and reformate to reduce the benzene content in automotive gasolines. In comparison to the traditional technology, this technology ensures a benzene content below 0.7% and a 1–2-point...

  • California diesel consumption up slightly second quarter.  // Western Farm Press Exclusive Insight;9/30/2011, p3 

    Statistics are presented on state gasoline and diesel consumption for second quarter 2011 and for June 2011 from the California State Board of Equalization (BOE).

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics