Open AccessReversible microfluidic measurement with zinc tetraphenylporphyrin aiming at slipping NH 3 detection
Author(s) -
Zhou Hao,
Yin Qi,
Yang Zheng,
Song Yilin
Publication year - 2020
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2020.0135
Subject(s) - microfluidic chip , slipping , microfluidics , zinc , materials science , chip , tetraphenylporphyrin , detection limit , analytical chemistry (journal) , optoelectronics , nanotechnology , chemistry , chromatography , photochemistry , metallurgy , computer science , mechanical engineering , porphyrin , engineering , telecommunications
A microfluidic chip that can realise reversible and highly selective NH 3 detection by separating NH 3 from the complex environment is fabricated for slipping NH 3 detection. The microfluidic chip consisting of the reaction unit, the gas‐diffusion unit and detection unit applied the immobilised zinc tetraphenylporphyrin as the indicating material. The continuous spectrum change showed the light intensity decreased in the green range (500–550 nm). Based on the analysis of the spectrum change at 528 nm, a one‐to‐one relationship between the spectrum change and concentration was revealed. The reversibility of the detection process makes the detection advantageous. Also, the rapidity of the proposed method is proved by the time responses of the indicating and recovering processes. According to the 40 tests conducted for various concentrations, it was concluded that the results are stable and the entire system is reliable.