Abstract
A indirectly heated pencil lead disk electrode (HPLDE) with direct current was fabricated. The dramatic temperature effect on the adsorptive accumulation of luteolin was demonstrated. A detection limit of 1.0×10−9M could be obtained (S/N=3) with an electrode temperature of 44°C, which was more than one magnitude lower than that at room temperature. It was applied to the determination of luteolin in simulated human urine with good accuracy. This heated electrode shows many merits such as easy fabrication and simple heating equipments, low cost, high thermal stability, high sensitivity and good reproducibility.
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