Citation: DONG Yuman, MENG Shixin, QU Fengmei, SUN Hejia, TANG Qiming, WANG Yaolei, MENG Tao. Microfluidic Droplets Flow for Urea Detection Based on Enzymatic Reaction in Aqueous Two-Phase System[J]. Chinese Journal of Applied Chemistry, ;2020, 37(2): 211-217. doi: 10.11944/j.issn.1000-0518.2020.02.190214 shu

Microfluidic Droplets Flow for Urea Detection Based on Enzymatic Reaction in Aqueous Two-Phase System

School of Life Science and Engineering, South West Jiaotong University, Chengdu 610031, China

Corresponding author: MENG Tao, taomeng@swjtu.edu.cn
Received Date: 1 August 2019
Revised Date: 11 October 2019
Accepted Date: 14 November 2019

Fund Project: Supported by the National Natural Science Foundation of China(No.21776230)the National Natural Science Foundation of China 21776230

Figures(6)

A simple and rapid microfluidic enzymatic reaction method was used to visualize the urea concentration. In the aqueous two-phase system (ATPS), ammonium carbonate produced by the enzymatic reaction discolors the neutral red indicator in droplets, and the color intensity of droplets is analyzed to determine the concentration of urea in the sample to be tested. The detection range can reach 0~50 mg/mL. The microfluidic ATPS droplet flow overcomes the challenge of low biocompatibility of traditional detection platforms based on oil-water droplet. Less consumption, extremely large specific surface area and micro-scale diffusion distance of droplet flow result in the high enzymatic reaction rate. The reaction rate is many times faster than that of traditional beaker method. The detection time is reduced to 20 s. The study aims to provide new ideas and reference for the rapid urea detection in the field of applied chemistry.
- urea detection,
- microfluidics,
- aqueous two-phase system,
- droplet flow,
- enzymatic reaction
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