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Ph. D. ThesisPh. D. Thesis 9. Results  All Data Sets9. Results All Data Sets 9.3. Methanol, Ethanol and 1-Propanol by the RIfS Array and the 4l Setup9.3. Methanol, Ethanol and 1-Propanol by the RIfS Array and the 4l Setup
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Ph. D. Thesis
  Abstract
  Table of Contents
  1. Introduction
  2. Theory Fundamentals of the Multivariate Data Analysis
  3. Theory Quantification of the Refrigerants R22 and R134a: Part I
  4. Experiments, Setups and Data Sets
  5. Results Kinetic Measurements
  6. Results Multivariate Calibrations
  7. Results Genetic Algorithm Framework
  8. Results Growing Neural Network Framework
  9. Results All Data Sets
    9.1. Methanol and Ethanol by SPR
    9.2. Methanol, Ethanol and 1-Propanol by SPR
    9.3. Methanol, Ethanol and 1-Propanol by the RIfS Array and the 4l Setup
      9.3.1. Signals and Data Preparation
      9.3.2. Mixtures by the RIfS Array
      9.3.3. Mixtures by the 4l Setup
      9.3.4. Conclusions
    9.4. Quaternary Mixtures by the SPR Setup and the RIfS Array
    9.5. Quantification of the Refrigerants R22 and R134a in Mixtures: Part II
  10. Results Various Aspects of the Frameworks and Measurements
  11. Summary and Outlook
  12. References
  13. Acknowledgements
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9.3.   Methanol, Ethanol and 1-Propanol by the RIfS Array and the 4l Setup

The data sets of ternary mixtures of methanol, ethanol and 1-propanol in air, which are described in section 4.5.2.3 in more detail, were recorded for transferring the principle of time-resolved measurements to other setups and to other detection principles. The measurements were performed by the two RIfS devices, the sensor array setup and the low-cost 4l setup. As the signal to noise ratio is rather poor for the measurement by the RIfS array setup (3 Makrolon layers and 1 PUT layer), it is investigated if a smoothing of the sensor responses can improve the calibration. Additionally single-sensor RIfS setups are simulated by evaluating only single sensors of the array setup. Finally, the low-cost 4l setup is compared with the array setup.

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