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Journal of colloid and interface science v.512, 2018년, pp.819 - 825   SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Ionic liquid-based slab optical waveguide sensor for the detection of ammonia in human breath

Gao, Lifang (Research Center for Analytical Sciences, College of Sciences, Northeastern University, Box 332, Shenyang 110819, China ) ; Yang, Xu (Research Center for Analytical Sciences, College of Sciences, Northeastern University, Box 332, Shenyang 110819, China ) ; Shu, Yang (College of Life Sciences and Health, Northeastern University, Box H006, Shenyang 110169, China ) ; Chen, Xuwei (Research Center for Analytical Sciences, College of Sciences, Northeastern University, Box 332, Shenyang 110819, China ) ; Wang, Jianhua (Research Center for Analytical Sciences, College of Sciences, Northeastern University, Box 332, Shenyang 110819, China ) ;
  • 초록  

    Abstract Hypothesis A novel slab optical waveguide sensor exploiting an ionic liquid (trihexyl(tetradecyl)phosphonium chloride)-based film can be used to detect gaseous ammonia. Bromothymol blue (BTB) incorporated into the ethyl cellulose–supported ionic liquid film can absorb the evanescent wave generated in the sensor and act as an indicator. The diffusion of gaseous ammonia across the sensing film is thus expected to change the absorbance of bromothymol blue, providing the basis for sensitive ammonia detection. Experiments The above sensor was exposed to different concentrations of ammonia gas, showing fast and reproducible responses and being superior to previously reported waveguiding-based sensors. Moreover, the fabricated system was used to detect ammonia in the breath of human volunteers. Findings Under optimal conditions, gaseous ammonia was accurately detected in the range of 100–1800 ppb, with a detection limit of 69 ppb (3 σ / s ). The developed sensor was re-usable due to exhibiting reversible gas sorption/desorption dynamics and was successfully applied to the determination of ammonia content in human breath. Graphical abstract Ionic liquid-based slab optical waveguide sensor for sensitive detection of ammonia content in human breath. [DISPLAY OMISSION]


  • 주제어

    Slab optical waveguide .   Ionic liquid .   Gaseous ammonia .   Exhaled gases.  

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