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Integrated Electrochemical Analysis System with Microfluidic and Sensing Functions.

Wataru Satoh1, Hiroki Hosono2, Hiroomi Yokomaku3

  • 1Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan. watarus@ims.tsukuba.ac.jp.

Sensors (Basel, Switzerland)
|November 24, 2016
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Summary
This summary is machine-generated.

This study presents an integrated device for automated solution transport and electroanalysis. The device efficiently measures multiple analytes, including glucose and enzymes, with high sensitivity and accuracy.

Keywords:
Flow channelamperometric sensorselectrowettingpotentiometric sensorsvalve

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Area of Science:

  • Biomedical Engineering
  • Analytical Chemistry
  • Microfluidics

Background:

  • Accurate and timely analysis of multiple analytes is crucial for diagnostics.
  • Existing methods often require complex sample handling and multiple devices.

Purpose of the Study:

  • To develop an integrated device for automated solution transport and simultaneous electroanalysis.
  • To demonstrate the device's capability in detecting various clinically relevant analytes.

Main Methods:

  • Construction of a device utilizing capillary action and electrowetting valves for solution transport.
  • Integration of electrochemical sensors for glucose, lactate, GOT, GPT, pH, ammonia, urea, and creatinine.
  • Implementation of an air gap structure for rapid ammonia, urea, and creatinine detection and NaOH addition for ammonia transport enhancement.

Main Results:

  • The integrated device successfully transported solutions and performed electroanalysis.
  • Distinct sensor responses were observed upon sample arrival, with linear relationships between signal output and analyte concentration.
  • Electrochemical elimination of L-ascorbic acid interferent was achieved.

Conclusions:

  • The developed integrated device offers a promising platform for automated, multi-analyte electroanalysis.
  • The device demonstrates efficient sample handling, rapid detection, and accurate quantification of various biomarkers.
  • This technology has potential applications in point-of-care diagnostics and biochemical monitoring.