卡死克农药浓度荧光光纤测量系统的研究

卡死克农药具有很高的杀虫和杀卵活性,可防制玉米、棉花、果树、蔬菜和大豆上的鞘翅目、双翅目和鳞翅目害虫.由于其速效性而被大量使用.但由于这类农药能造成土壤和水资源的污染,故实现对其浓度的监测具有重要意义.根据卡死克农药在紫外光的照射下能发射荧光的机理,研究了一种用于测量卡死克农药浓度的荧光光纤测量系统.该系统采用高压汞灯作为激发光源,结合光纤传感技术和微弱信号检测技术,实现了卡死克农药浓度的准确测量.用所研制的系统对卡死克的标?既芤航胁馐?在0.050～1.000 μg/ml浓度范围内,荧光强度与浓度基本呈线性关系.由于苯甲酰脲类农药的荧光性质相似,因此可以通过改变激发和发射滤光片以及系统配置参数,使用该仪器对其他苯甲酰脲类农药(氟铃脲和杀铃脲等)的浓度进行监测.研制的苯甲酰脲类农药浓度测量荧光光纤测量系统具有灵敏度高、线性范围宽、成本低等特点.本研究为进一步提高国内污染物检测水平和拓展环境监测仪器的实际应用奠定了良好的基础.

The Study of a Fluorescence Fiber-Optical Measurement System for Monitoring Concentration of Flufenoxuron

Flufenoxuron has very high insecticidal and ovicidal activity. It can prevent coleoptera, diptera and lepidoptera injurious insects from damaging maize, cotton, fruit, vegetable and soybean. It has been used in a great quantity for its characteristic of quick results, but can cause soil and water resource pollution. Therefore, it has an important value to monitor its concentration and develop monitoring instrument.Based on the mechanism that flufenoxuron can emit fluorescence in the ultraviolet light, a fluorescence fiber-optical measuring system is developed for monitoring its concentration. This system makes use of high-pressure mercury lamp as exciting light source. It combines with fiber-optical sensing technology to realize precise measurement of the concentration of flufenoxuron. Using this system to measure flufenoxuron's standard solutions,the fluorescence intensity has a linear relationship with the concentration in the concentration range of 0.050～1.000μg/ml.Because almost all the benzoyl urea pesticides(hexaflumuron and triflumuron,etc)by changing exciting and emitting filters and system configuration parameters.This fluorescence fiber-optical measuring system for measuring the concentration of benzoyl urea pesticides has several characteristics such as high sensitivity,wide linear range and low cost,etc.This research has established a good base for further improving the capability of domestic pollution detection and developing actual application of environment monitoring instruments.