In this paper , a novel amperometric sensor is fabricated by surface modification of glassy carbon electrode with Ag/Cu/SWNTs nanocomposites to determine hydrogen peroxide (H2 O2 ) . The morphology and element composition of the material are investigated by scanning electron microscopy (SEM ) and energy dispersive X‐ray spectrum(EDS) . The electrocatalysis properties are analyzed by cyclic voltammetry (CV) . Under the optimized conditions (-0.3 V of electrodeposition voltage and 4 mmol・L-1 of silver nitrate concentration) , the fabricated sensor displays a broader linear range and a lower detection limit for H 2 O2 . The linear range is from 1.33 to 170 μmol・L -1 with a detection limit of 0.86 μmol・L -1 (S/N=3) . The sensor has good selectivity , reproducibility , long term stability with a swift response time of 2 s and has been used to determine H2 O2 in real disinfector samples with favorable recoveries .%用Ag／Cu／SWNTs纳米复合材料修饰玻碳电极构筑了一种新的过氧化氢安培传感器．该纳米材料的形貌和成分用扫描电镜和能谱仪进行了表征，修饰电极的催化效果以循环伏安法（C V ）进行了分析．在纳米铜的沉积电位为－0.3 V ，银溶液浓度为4 mmol・L －1下，该传感器检测过氧化氢时表现出宽的线性范围（1.33～170μmol・L －1），低的检出限（0.86μmol・L －1，S／N＝3），选择性、重现性能良好，电流响应快，能在2 s内达到稳态电流，并可用于测定真实的消毒剂样品，获得满意的回收率．
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