基于光电二极管的黄曲霉素含量检测器的研究

Design Aflatoxin Detector Based on Photodiode Technology

黄曲霉素是粮食农产品中的主要污染物之一,对农业、人类健康、贸易和社会经济发展造成了严重影响,确定黄曲霉素的含量是否符合相关限量标准是实施农产品安全控制的关键。本文分析了黄曲霉素的荧光特性和荧光产生机理,以紫外线LED作为激发光源,利用光电二极管进行荧光信号采集和光电转换,用MCU进行数据拟合处理,设计出黄曲霉素含量检测器。试验结果表明:黄曲霉素含量检测器便于携带、可靠耐用、成本低、操作简便,可以在现场快速地对农产品中黄曲霉素含量做出定性、定量筛查。

The aflatoxin,which is badly disadvantage for health of men,developing of agriculture,business and social economic,is a mainpollutant in agricultural product.It is key for safely controlling agricultural product by determining whether the aflatoxin up to standards ornot.The fluorescent properties and produce mechanism of aflatoxin are studied in detail in this work.Utilizing ultraviolet rays LED for thesource of laser light and,the photodiode for collecting the fluorescent signal and photoelectric conversion and,MCU for dealing with fittingdatum,the aflatoxin content detector is designed by us.This detector has many merits such as easy to carry,reliable and durable,low cost,easy operation and to make judgment of qualitative and quantitative of aflatoxin content in farm produce at spot quickly.