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使用循环伏安法和恒电位法将聚苏木精和Ni O相继沉积至碳糊电极表面构建了Ni O/聚苏木精复合物修饰电极。运用电化学阻抗技术、循环伏安法探究了Ni O/聚苏木精复合物的表面形貌、组成及电化学性质。该修饰电极被用来检测抗菌药物加替沙星。相比裸碳糊电极,加替沙星在该修饰电极上的氧化峰电流分别提高了3倍,峰电位得到了负移。实验结果表明,加替沙星的线性范围是0.5~160μmol/L,检测限(S/N=3)为0.01μmol/L。相比其他检测技术,该修饰电极已用于实际样品中加替沙星检测。
Cyclic voltammetry and potentiostatic method were used to deposit poly-hematoxylin and NiO onto the surface of carbon paste electrode. NiO / poly-hematoxylin composite electrode was fabricated. The morphology, composition and electrochemical properties of NiO / poly-hematoxylin composite were investigated by electrochemical impedance spectroscopy and cyclic voltammetry. The modified electrode was used to detect the antibacterial drug gatifloxacin. Compared with bare carbon paste electrode, gatifloxacin oxidation peak current in the modified electrode increased by 3 times, the peak potential was negative shift. The experimental results showed that the linear range of gatifloxacin was 0.5 ~ 160μmol / L, and the detection limit (S / N = 3) was 0.01μmol / L. Compared with other detection techniques, the modified electrode has been used in real samples of gatifloxacin detection.