设计了一种应用酶传感器的便携式农药浓度测量装置,由丝网印刷酶电极、信号调理电路和单片机C8051F040组成.酶传感电极修饰方法使涂层电荷转移电阻减小而加速电荷转移.装置检测出酶抑制率与农药(西维因)浓度的对数在农药(西维因)质量浓度为5 ng/mL～2 μg/mL时呈线性关系,最低检出限为1.7 ng/mL,检出时间小于161 s,系统尺寸小,可采用电池供电,为数量级μg/L的农药质量浓度现场检测(如农药喷雾现场)提供了一种便携式快速测量装置.%A kind of portable device for measuring concentration of pesticides used with enzyme sensor was designed. It included screen-printed enzyme electrode, signal conditioning circuit and MCU C8051F040. The preparation of enzyme electrode made the coated resistance of charge transfer reduced, charge transfer accelerated; and a reliable liner relationship between the inhibition of enzyme and log [ carbaryl ] was obtained from 5 ng/mL to 2 μg/mL, with the detection limitation of 1. 7 ng/mL. Response time of the device was less than 161s. The size of the device was small and the power was supported by battery. It provided a portable device for rapid measuring and spotty concentration of pesticide in μg/L level.
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