基于铜金复合纳米材料的半胱氨酸检测

Detection of Cysteine Based on Copper-gold Composite Nanomaterials

铜金复合纳米材料作为一种新型探针,可灵敏地选择性检测半胱氨酸。在碘离子存在的情况下,半胱氨酸能够使铜金复合纳米材料的吸收峰信号增强,从而实现半胱氨酸的定量检测,检测限为0.06 mmol/L,线性范围为0~1 mmol/L。与其他氨基酸相比,铜金复合纳米材料传感器对半胱氨酸显示出良好的选择性,所制备的铜金复合纳米材料无需任何处理即可直接用于检测体系,大大简化了检测流程,具有简单、快捷和选择性高等优点,可作为半胱氨酸检测的有力工具。

As a new type of probe, copper-gold composite nanomaterials can sensitively and selectively detect cysteine. In the presence of iodide ion, cysteine can enhance the absorption peak signal of copper-gold composite nanomaterials, so as to realize the quantitative detection of cysteine. The detection limit was 0.06 mmol/L and the linear range was 0 ~ 1 mmol/L. Compared with other amino acids, the sensor showed good selectivity for cysteine. The prepared copper gold composite nano materials can be directly used in the detection system without any treatment, which greatly simplifies the detection process. The sensor has the advantages of simplicity, rapidity and high selectivity, and can be used as a powerful tool for cysteine detection.