Avaliação de contaminantes inorgânicos e orgânicos em álcool combustível utilizando eletroforese capilar

• Autor(a) principal: Pereira,Elisabete A.
• Data de Publicação: 2006
• Outros Autores: Tavares,Marina F. M., Stevanato,Alessandra, Cardoso,Arnaldo A.
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Química Nova (Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422006000100014
• topic: inorganic and organic contaminants; alcohol fuel; capillary electrophoresis

This work reports the analysis of inorganic and organic contaminants in alcohol fuel samples using capillary electrophoresis. Chloride and sulfate were analyzed in nitrate/ monochloroacetic acid at 10 mmol L-1 concentration each under indirect UV detection (210 nm). The analysis of aldehydes is based on the 216 nm detection of 3-methyl-2-benzothiazoline hydrazone adducts. The running buffer consisted of 20 mmol L-1 tetraborate , 40 mmol L-1 sodium dodecyl sufate and 12 mmol L-1 beta-ciclodextrin. Both methodologies were applied to real samples indicating inorganic ion concentrations from 0.15 to 6.64 mg kg-1 and aldehydes from 32.0 to 91.3 mg L-1.