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Review on liquid-core waveguide technology and its application for spectroscopic analysis

文献类型： 外文期刊

作者： Mu, Bingyu 1 ; Li, Xue 1 ; Liu, Jixin 1 ; Mao, Xuefei 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Qual Stand & Testing Technol Agroprod, Beijing 100081, Peoples R China

2.Minist Agr & Rural Affairs, Key Lab Agrofood Safety & Qual, Beijing 100081, Peoples R China

3.Beijing Abil Technol Co Ltd, Beijing 100081, Peoples R China

关键词： liquid core waveguide; total internal reflection; long path-length; teflon AF; Spectroscopic analysis

期刊名称：MICROCHEMICAL JOURNAL （ 影响因子：4.8； 五年影响因子：4.5 ）

ISSN： 0026-265X

年卷期： 2024 年 199 卷

页码：

收录情况： SCI

摘要： Liquid core waveguide (LCW) is well known as a sampling, light path and signal enhancement tool for miniaturized or portable instrumentation of spectroscopic analysis such as absorption, fluorescence, and Raman spectroscopy. Total internal reflection (TIR) occurs in various LCW apparatus to increase the optical path and thereby enhance detection sensitivity by several orders of magnitude. Teflon AF is made up of tetrafluoroethylene and 2,2-difluoromethyl-4,5-difluoro-1,3-dioxide. In this review, the working principle, different types, and characteristics of Teflon AF LCW were systematically discussed. The different detection methods based on Teflon AF LCW, including absorbance spectrophotometry, fluorescence spectrophotometry, and Raman spectroscopy, were then discussed in detail. The application fields for Teflon AF LCW were also summarized, involving metallic ions, N, S, pesticide and veterinary residues, protein-based medicines, and other compounds in food, environmental, biological, medicine samples. The current challenges and potential future opportunities for Teflon AF LCW were emphasized to improve their study and application

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