棱镜
草甘膦
跟踪(心理语言学)
联轴节(管道)
波导管
光学
环境科学
材料科学
物理
生物
农学
复合材料
语言学
哲学
作者
Hanren Dai,Ming-huang Sang,Yuxing Wang,Rui Du,Yumei Wen,Zhiwei Jia,Zhang Cao,Xianfeng Chen
标识
DOI:10.1016/j.sna.2014.07.022
摘要
Abstract We herein discuss a prism coupling hollow-core metal-cladded waveguide (HCMW) sensor that uses ultrahigh-order modes (UHM) for sensitive absorption detection of glyphosate. In our method, modified chromogenic glyphosate in the hollow-core serves as guiding medium for high-power wave propagation. Prism coupling is employed to generate attenuated total reflection (ATR) dips of the UHM. The depths of the dips are closely related to the extinction coefficient of chromogenic glyphosate. A glyphosate detection limit below1.4 nm/l is experimentally demonstrated with low consumption and solution-free operation. The calibration curve has been found linear in the concentration range of 0.0−5.0 nm/l.
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