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A Microfluidic-based Electrochemical Biochip for Label-free DNA Hybridization Analysis
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Simple lab-on-chip approach with time-based detection.

K Grudpan1, S Lapanantnoppakhun, S Kradtap Hartwell

  • 1Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand. kate@chiangmai.ac.th

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Summary

This study introduces a simple lab-on-chip device for chemical analysis. The platform uses visual, time-based detection of reaction zone migration for analyzing ascorbic acid, acetic acid, and iron in real samples.

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Area of Science:

  • Analytical Chemistry
  • Microfluidics
  • Chemical Sensing

Background:

  • Lab-on-chip (LOC) devices offer miniaturized platforms for chemical analysis.
  • Developing simple, cost-effective detection methods for LOC systems is crucial for broader adoption.
  • Visual detection methods can enhance accessibility and reduce the need for complex instrumentation.

Purpose of the Study:

  • To propose a straightforward lab-on-chip approach utilizing time-based detection.
  • To demonstrate the feasibility of visually monitoring reaction zone migration for quantitative analysis.
  • To showcase the application of this method for determining ascorbic acid, acetic acid, and iron in real samples.

Main Methods:

  • Fabrication of a lab-on-chip platform from acrylic with specifically designed channels.
  • Manipulation of fluid flow for sample and reagent introduction.
  • Visual monitoring of the reaction zone's migration over time using a stopwatch.
  • Application of different chemical reactions for analyte determination.

Main Results:

  • Successful implementation of a simple lab-on-chip device.
  • Demonstration of time-based visual detection of reaction zone migration.
  • Accurate determination of ascorbic acid, acetic acid, and iron in various real samples.
  • Validation of the method across different chemical principles.

Conclusions:

  • The proposed lab-on-chip approach provides a simple and visually accessible method for chemical analysis.
  • Time-based detection of reaction zone migration is a viable strategy for quantitative measurements.
  • This platform shows potential for point-of-care or field testing applications due to its simplicity and low cost.