FOOD SCIENCE ›› 2013, Vol. 34 ›› Issue (22): 341-345.doi: 10.7506/spkx1002-6630-201322069

Previous Articles     Next Articles

Fabrication and Analytical Application of Three-Dimensional Paper-Based Microfluidics for Rapid Detection of Nitrite

XIAO Liang-pin,LIU Xian-ming,LIU Qi-shun,ZHONG Run-tao,ZHOU Xiao-mian,LIN Bing-cheng,DU Yu-guang   

  1. 1. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. Research Centre of Laboratory on a Chip (Dalian China), Dalian 116023, China;4. Guangzhou First Municipal People’s Hospital, Guangzhou 510180, China
  • Received:2013-01-30 Revised:2013-10-29 Online:2013-11-25 Published:2013-12-05
  • Contact: Liangpin XIAO E-mail:lpxiaodicp@foxmail.com

Abstract:

Medium-speed qualitative filter paper was employed to fabricate paper-based microfluidics and 3D paper-based
microfluidics were integrated by wax printing-bookbinding method; a nitrite indicator containing 63.4 g/L citric Acid, 8.61 g/L sulfanilamide
and 2.59 g/L N-(1-naphthyl) ethylenediamine coupled with a lab-prepared colorimetric detection device was used
for nitrite determination. The 3D paper-based microfluidics could rapidly test nitrite, and the image acquired was analyzed
using a gray model for gray intensity representing the concentration of nitrite. The linear range was 0–10 mg/L, with correlation
coefficient of 0.9920. The detection limit of the method was 2 mg/L, and the recovery of nitrite from spiked samples
was 91.4%–102.0%. After stored under normal conditions and 4 ℃ for 7 weeks, the color intensity of the paper-based microfluidics
for nitrite detection were little change. The 3D paper-based microfluidics can provide a simple, easy to use, low-cost
and sensitive approach for rapid detection of in foods with small sample consumption.

Key words: paper-based microfluidics, three-dimension, nitrite, rapid detection

CLC Number: