采用超声法一步合成了三聚氰胺-甲醛-乙二胺四草酰乙酸螯合树脂/纳米碳管复合物。采用红外光谱、场发射扫描电镜及电化学技术表征了材料的特性。该复合物修饰充蜡石墨电极被成功应用于水溶液中重金属离子Pb(Ⅱ)、Cd(Ⅱ)和Zn(Ⅱ)的同时测定,检测限分别为1×10-10、1×10-8和5×10-8 mol.L-1(3σ)。 One-step synthesis of melamine-formaldehyde-ethylenediaminetetraoxaloylacetic acid chelate resin / carbon nanotube composite by ultrasonic method. The properties of the materials were characterized by infrared spectroscopy, field emission scanning electron microscopy and electrochemical techniques. The composite modified graphite electrode was successfully applied to the simultaneous determination of heavy metal ions Pb (Ⅱ), Cd (Ⅱ) and Zn (Ⅱ) in aqueous solution with the detection limits of 1 × 10-10, 1 × 10-8 and 5 × 10-8 mol.L-1 (3σ).