CAJ | 학술논문

将EDTA-Cu（Ⅱ）配合物与纳米TiO2混合修饰到碳糊电极上,用循环伏安法考察了修饰电极测量镉离子的实验优化条件和电极稳定性。结果表明：在底液0.10 mol/L pH=4.5的HAc-NaAc缓冲溶液（含0.10 mol/L的KNO3）中,当镉离子在修饰电极表面富集10 min,电位扫描速度控制在100 mV/s时,峰电流与Cd2＋浓度在1.0×10-8～1.0×10-5mol/L的范围内成良好的线性关系,相关系数为R=0.9965,检出限为6.1×10-9mol/L。
장EDTA-Cu（Ⅱ）배합물여납미TiO2혼합수식도탄호전겁상,용순배복안법고찰료수식전겁측량력리자적실험우화조건화전겁은정성。결과표명：재저액0.10 mol/L pH=4.5적HAc-NaAc완충용액（함0.10 mol/L적KNO3）중,당력리자재수식전겁표면부집10 min,전위소묘속도공제재100 mV/s시,봉전류여Cd2＋농도재1.0×10-8～1.0×10-5mol/L적범위내성량호적선성관계,상관계수위R=0.9965,검출한위6.1×10-9mol/L。
EDTA-Cu（Ⅱ） complex and nano-TiO2 mixed to modify carbon paste electrode,optimum conditions for detection of trace cadmium at the modified electrode and the electrochemistry stability of the modified electrode were investigated by cyclic voltammetry.When the accumulation time was 10 min and the potential scan rate was 100 mV/s,in 0.10 mol/L HAc-NaAc buffer（including 0.10 mol/L KNO3） whose pH was 4.5,there was a good liner relationship between the peak current and Cd2＋ concentration in a range of 1.0×10-8 ～1.0×10-5 mol/L with a correlation coefficient of 0.9965,and the detection limit was 6.1×10-9 mol/L.