【摘要】 本文研究了硫辛酸修饰电化学活化碳纤维电极。此电极在测定脑神经递质多巴胺（DA）时，具有较高的灵敏度和较好的选择性，它能够有效地消除抗坏血酸（AA）的干扰。该电极测定多巴肢的线性范围为1×10-8～1×10-5mol／L；检出下限为5×10－9mol／L。更多还原

【Abstract】 An electrochemically pretreated carbon fibre microeleetrode modified with lipoic acid has been studied. It shows high sensitivity and good selectivity for the determination of neurotransmitterdopamine. It can effectively eliminate the interference of ascorbic acid. The linear range is 1.0×10-8~1.0×10-5 mol/L and the detection limit is 5×10-9 mol/L.This novel chemically modified carbon fibre microelectrode could be used in the determination of neurotransmitters in vivo.更多还原