A portable low-power acquisition system with a urease bioelectrochemical sensor for potentiometric detection of urea concentrations

Wei Jhe Ma, Ching Hsing Luo, Jiun Ling Lin, Sin Houng Chou, Ping Hung Chen, Mei Jywan Syu, Shin Hung Kuo, Shin Chi Lai

研究成果: Article同行評審

14 引文 斯高帕斯(Scopus)

摘要

This paper presents a portable low-power battery-driven bioelectrochemical signal acquisition system for urea detection. The proposed design has several advantages, including high performance, low cost, low-power consumption, and high portability. A LT1789-1 low-supply-voltage instrumentation amplifier (IA) was used to measure and amplify the open-circuit potential (OCP) between the working and reference electrodes. An MSP430 micro-controller was programmed to process and transduce the signals to the custom-developed software by ZigBee RF module in wireless mode and UART in able mode. The immobilized urease sensor was prepared by embedding urease into the polymer (aniline-co-o-phenylenediamine) polymeric matrix and then coating/depositing it onto a MEMS-fabricated Au working electrode. The linear correlation established between the urea concentration and the potentiometric change is in the urea concentrations range of 3.16 × 10-4 to 3.16 × 10-2 M with a sensitivity of 31.12 mV/log [M] and a precision of 0.995 (R2 = 0.995). This portable device not only detects urea concentrations, but can also operate continuously with a 3.7 V rechargeable lithium-ion battery (500 mA·h) for at least four days. Accordingly, its use is feasible and even promising for home-care applications.

原文English
文章編號474
期刊Sensors (Switzerland)
16
發行號4
DOIs
出版狀態Published - 2016 4月 2

All Science Journal Classification (ASJC) codes

  • 分析化學
  • 生物化學
  • 原子與分子物理與光學
  • 儀器
  • 電氣與電子工程

指紋

深入研究「A portable low-power acquisition system with a urease bioelectrochemical sensor for potentiometric detection of urea concentrations」主題。共同形成了獨特的指紋。

引用此