中文摘要：

采用循环伏安法制备了钯纳米粒子-Nation修饰玻碳电极（Pd／Nf／GCE）的甲醛电化学传感器，并采用循环伏安法（CV）和微分脉冲伏安法（DPV）研究了甲醛在该修饰电极上的电催化氧化作用．对修饰电极制备条件和实验条件进行了优化，在此基础上建立了一种测定甲醛的伏安分析方法．实验结果表明，甲醛在该传感器上的催化氧化作用显著；在0．1mol／LNaOH溶液中，甲醛的氧化峰电流与其浓度在5．0μmol／L-5．0mmol／L呈良好的线性关系，线性叫归方税为：ip=7．69＋2．22×10^4c，相关系数Y=0．9967，检测限为1．0μmol／L，具有良好的重现性和回收率．

英文摘要：

A novel electrochemical sensor for the detection of formaldehyde is prepared based on electrodepositing palladium nanoparticles on the Nation film coated glassy carbon electrode （Pd/Nf/GCE） through cyclic vohammetry （CV）. Electrocatalytieal behaviors of the modified electrode are investigated by cyclic vohammetry and differential pulse voltammetry （DPV）. Experimental conditions are optimized and a vohammetric method for determining formaldehyde is developed. Experimental results show that the electrode displays a remarked electrocatalytic activity in alkaline solution and exhibits a linear response to formaldehyde in the range of 5.0 μmol/L - 5.0 mmol/L. The linear regression equation is ip = 7.69 ＋ 2.22 ×10^4 c with a correlation eoeffieient of 0. 996 7 and the detection limit is estimated to be 1.0 μmol/L calculated from the signalto-noise ratio of 3： 1. The presented methods of determining formaldehyde exhibit good reproducibility and reeovery.