利用太赫兹时域光谱检测农产品中2种酰胺类农药残留  

Determination of 2 Amides Pesticide Residues in Agricultural Products by Terahertz Time-domain Spectroscopy

作　　者：王孝伟[1] 王强[1] 王花丽[1] 

机构地区：[1]中国计量学院质量与安全工程学院,浙江杭州310018

出　　处：《安徽农业科学》2010年第32期18184-18186,共3页Journal of Anhui Agricultural Sciences

基　　金：国家质检公益性科研专项资助(200910181);国家自然科学基金项目(60902095)

摘　　要：[目的]探讨THz技术在农药识别和残留量检测中的应用。[方法]利用太赫兹时域光谱（THz-TDS）技术对2种除草剂丁草胺和异丙甲草胺在室温氮气环境下的THz远红外光谱特性进行测定,并利用菲涅尔公式的数据处理模型求取了其在0.2~2.2 THz波段内的折射率和吸收系数。[结果]2种农药在0.2~2.2 THz波段内分别存在不同的特征吸收峰。尽管2种农药分子结构相似,但其吸收谱和折射率却存在很大差异。[结论]THz-TDS技术在农药微量残留检测方面是可行的,特别是在识别结构较为相似的物质上有较大优势。[Objective] The aim was to explore the application of terahertz（THz） technique in pesticide recognition and residue determination.[Method] THz far-infrared spectral characteristics of 2 herbicides（butachlor and metolachlor） were measured by THz time-domain spectroscopy（THz-TDS） under conditions of room temperature and nitrogen,meanwhile their refractive index and absorption coefficient between 0.2 and 2.2 THz were calculated by using models based on Fresenl equations.[Result] The 2 pesticides both had a series of different characteristic absorption peaks between 0.2 and 2.2 THz,respectively.Their molecular structures were similar,but there were great difference in absorption and refractive index spectrum between them.[Conclusion] THz-TDS technique is feasible to detect pesticide residues,especially there is a greater advantage in identifying the structure of similar substances.

关 键 词：太赫兹波 农药残留 太赫兹时域光谱 丁草胺 异丙甲草胺 

分 类 号：TP391[自动化与计算机技术—计算机应用技术] O434.3[自动化与计算机技术—计算机科学与技术]