Development of an Analytical Methodology for Quantification of Strong Acid in Diesel Oil
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
20/10/2012
20/10/2012
2009
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Resumo |
Many factors can affect the quality of diesel oil, in particular the degradation processes that are directly related to some organosulfur compounds. During the degradation process, these compounds are oxidized into their corresponding sulfonic acids, generating a strong acid content during the process. p-Toluene sulfonic acid analysis was performed using the linear sweep voltammetry technique with a platinum ultramicroelectrode in aqueous solution containing 3 mol L(-1) potassium chloride. An extraction step was introduced prior to the voltammetric detection in order to avoid the adsorption of organic molecules, which inhibit the electrochemical response. The extraction step promoted the transference of sulfonic acid from the diesel oil to an aqueous phase. The method was accurate and reproducible, with detection and quantification limits of 5 ppm and 15 ppm, respectively. Recovery of sulfonic acid was around 90%. Brazilian National Petroleum Agency (ANP) Brazilian National Petroleum Agency (ANP) Brazilian Agency Brazilian agency Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) National Counsel for Technological and Scinentific Development (CNPq) Petrobras PETROBRAS |
Identificador |
ELECTROANALYSIS, v.21, n.20, p.2277-2280, 2009 1040-0397 http://producao.usp.br/handle/BDPI/31717 10.1002/elan.200900143 |
Idioma(s) |
eng |
Publicador |
WILEY-V C H VERLAG GMBH |
Relação |
Electroanalysis |
Direitos |
restrictedAccess Copyright WILEY-V C H VERLAG GMBH |
Palavras-Chave | #Strong acid content #Diesel oil #Ultramicroelectrodes #Voltammetry #Acidity #HYDROGEN EVOLUTION REACTION #STEADY-STATE VOLTAMMETRY #WEAK ACIDS #SUPPORTING ELECTROLYTE #PLATINUM MICROELECTRODE #REDUCTION #ULTRAMICROELECTRODES #TITRATION #SOLVENT #Chemistry, Analytical #Electrochemistry |
Tipo |
article original article publishedVersion |