Determinação de corantes marcadores do tipo azo e antraquinona em combustíveis por cromatografia líquida com detecção eletroquímica Determination of azo and anthraquinone dyes in fuels sample using hplc with electrochemical detection

• Main Authors: Magno Aparecido Gonçalves Trindade, Daniel Rinaldo, Wagner Vilegas, Maria Valnice Boldrin Zanoni
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Química 2010-01-01
• Series: Química Nova
• Subjects: solvent Blue 14 dye; solvent Red 24 dye; fuel analysis
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422010000100027

<abstract language="eng">An analytical method based on high-performance liquid chromatography with electrochemical detection has been developed and applied to the determination of Solvent blue 14 (SA-14) and Solvent red 24 (SV-24) in fuel samples. The dyes were better separated on C18 column, using a mobile phase composed of acetonitrile and ammonium acetate (90:10, v/v). Detection was carried out at an oxidation potential of +0.85V. The detector response was linear at concentration range of 7.50×10-8 - 1.50×10-6 mol L-1 (r = 0.997) for SA-14 and SV-24, respectively. The method was used to quantify these dyes in fuels samples with satisfactory accuracy and precision.