Artículos de revistas
Simultaneous Differential Pulse Voltammetric Determination of Ascorbic Acid and Caffeine in Pharmaceutical Formulations Using a Boron-Doped Diamond Electrode
Fecha
2010Registro en:
ELECTROANALYSIS, v.22, n.15, p.1717-1723, 2010
1040-0397
10.1002/elan.200900612
Autor
LOURENCAO, Bruna Claudia
MEDEIROS, Roberta Antigo
ROCHA-FILHO, Romeu C.
FATIBELLO-FILHO, Orlando
Institución
Resumen
A cathodically pretreated boron-doped diamond electrode was used for the simultaneous anodic determination of ascorbic acid (AA) and caffeine (CAF) by differential pulse voltammetry Linear calibration curves (r = 0 999) were obtained from 1 9 x 10(-5) to 2 I x 10(-4) mol L(-1) for AA and from 9 7 x 10(-6) to 1 1 x 10-4 mol L(-1) for CAF. with detection limits of 19 wool L(-1) and 7 0 mu nol L(-1). respectively This method was successfully applied for the determination of AA and CAF in pharmaceutical formulations. with results equal to those obtained using a HPLC reference method