基于太赫兹超材料技术低浓度莠去津的快速检测

除草剂不恰当的处理会导致土壤、水和空气的污染，并且会通过环境进入食物链，影响人体健康。莠去津作为常见的除草剂，在世界范围内的水环境中经常被检测到。目前常用的检测方法主要依赖于大型仪器，一般需要复杂的预处理，并且对操作人员的技能要求较高，难以普及。随着光学材料的发展，太赫兹超材料技术如今已扩展到越来越多的领域，常用于识别物质的细微变化。采用太赫兹光谱技术结合超材料检测低质量浓度莠去津溶液（0,1,10,100,1 000和2 000μg/L），测得的透射谱经过归一化处理以及拟合分析。实验结果表明，利用太赫兹光谱技术结合超材料能够精确检测到1～2 124μg/L的莠去津质量浓度变化，有效提高农药检测的灵敏度。

Rapid detection of atrazine in low concentration based on terahertz metamaterial technology

Improper treatment of herbicides can cause soil, water and air pollution, and will enter the food chain through the environment, which will affect human health. Atrazine, as a common herbicide, is often detected in the water environment around the world. At present, the main detection methods mainly depend on large instruments, which usually need complex pretreatment, and the skill requirements of operators are high, which is difficult to popularize. With the development of optical materials, terahertz has been expanded to more and more fields, and it is often used to identify the subtle changes of materials. The transmission spectrum of atrazine solution (0, 1, 10, 100, 1000, 2000 ug/L) was detected by terahertz spectroscopy and ultra-material. The transmission spectrum was normalized and analyzed by fitting. The experimental results show that the concentration of atrazine in the range of 1-2124 ug/L can be detected accurately by using terahertz spectroscopy and the super materials, which can effectively improve the sensitivity of pesticide detection.