中文摘要：

核酸适配体生物传感器是利用固定在电极表面的适配子与被测溶液中心肌肌钙蛋白Ⅰ（cTnⅠ）发生特异性结合,从而达到检测的目的.我们对玻碳电极进行阳极氧化、氨基化修饰,通过碳二亚胺盐酸盐（carbodiimide hydrochloride,EDC）、N-羟基琥珀酰亚胺（N-hydroxysuccinimide,NHS）活化作用将适配子结合在电极表面.cTnⅠ最佳检测范围是0.05-5 nmol/L,最低检测限为0.05 nmol/L,检测时间为5 min.

英文摘要：

A new aptamer biosensor for detection of cTn I was established. It can detect cTn I in samples. The surface of GC was modified with anode-oxidation, amidation and activation modification. We used EDC and NHS as activators. Due to aptamer＇s specificity for cTn I, we can detect the concentration of cTn I in sample solution. The linear range of the analytical signal is observed from 0.05 -5 nmol/L. The lowest detected concentration is 0.05 nmol/L. The detection time is 5 min.