Reversible microfluidic measurement with zinc tetraphenylporphyrin aiming at slipping NH 3 detection

Micro & nano letters

article

Hao Zhou¹  Qi Yin¹  Zheng Yang¹  Yilin Song¹ 

[1] State Key Laboratory of Clean Energy Utilization, Zhejiang University

关键词: diffusion;    microfluidics;    visible spectra;    organic compounds;    gas sensors;    ammonia;    zinc compounds;    membranes;    separation;    reversible microfluidic measurement;    microfluidic chip;    gas-diffusion unit;    zinc tetraphenylporphyrin;    slipping NH3 detection;    membranes;    separation;   

DOI  :  10.1049/mnl.2020.0135

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

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.

【 授权许可】

CC BY|CC BY-ND|CC BY-NC|CC BY-NC-ND