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CCD camera full range pH sensor array.

A Safavi1, N Maleki, A Rostamzadeh

  • 1Department of Chemistry, Faculty of Sciences, Shiraz University, Shiraz 71454, Iran.

Talanta
|December 17, 2008
PubMed
Summary
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This study compared mathematical methods for analyzing optical sensor array data. Microsoft Excel

Area of Science:

  • Analytical Chemistry
  • Sensor Technology
  • Data Analysis

Background:

  • Optical sensor arrays offer a versatile platform for chemical sensing.
  • Accurate interpretation of sensor responses is crucial for quantitative analysis.
  • Traditional methods may require complex calibration or specialized software.

Purpose of the Study:

  • To evaluate and compare various mathematical and chemometric methods for pH sensing using optical sensor arrays.
  • To determine the efficacy of accessible software, like Microsoft Excel's Solver, against advanced chemometric techniques.
  • To establish a reliable method for associating sensor color changes with specific pH values.

Main Methods:

  • Optical sensor arrays responding across the full pH range were employed.

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  • Color changes were captured using a CCD camera and processed with custom software.
  • Various mathematical and chemometric methods, including Artificial Neural Network (ANN) and Partial Least Square (PLS), were investigated for data analysis.

    • Main Results:

    • Colorimetric data from the sensor array were successfully acquired and processed.
    • Microsoft Excel's Solver demonstrated excellent agreement with advanced chemometric methods (ANN, PLS) in pH determination.
    • The study validated the effectiveness of simpler mathematical approaches for sensor data interpretation.

    Conclusions:

    • Accessible tools like Microsoft Excel's Solver can achieve high accuracy in quantitative analysis of optical sensor array data.
    • This finding simplifies the process of pH monitoring using colorimetric sensor arrays.
    • The study highlights the potential for using readily available software in chemometric applications.