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Ph. D. ThesisPh. D. Thesis 4. Experiments, Setups and Data Sets 4. Experiments, Setups and Data Sets 4.5. Data Sets 4.5. Data Sets 4.5.2. Homologous Series of the Low Alcohols4.5.2. Homologous Series of the Low Alcohols
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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
    4.1. The Sensor Principle
    4.2. SPR Setup
    4.3. RIfS Sensor Array
    4.4. 4l Miniaturized RIfS Sensor
    4.5. Data Sets
      4.5.1. Refrigerants R22 and R134a
      4.5.2. Homologous Series of the Low Alcohols
        4.5.2.1. Methanol and Ethanol by the SPR Setup
        4.5.2.2. Methanol, Ethanol and Propanol by the SPR Setup
        4.5.2.3. Methanol, Ethanol and Propanol by the RIfS Array and the 4l Setup
        4.5.2.4. Quaternary Mixtures of Alcohols by the RIfS Array and the SPR Setup
  5. Results Kinetic Measurements
  6. Results Multivariate Calibrations
  7. Results Genetic Algorithm Framework
  8. Results Growing Neural Network Framework
  9. Results All Data Sets
  10. Results Various Aspects of the Frameworks and Measurements
  11. Summary and Outlook
  12. References
  13. Acknowledgements
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4.5.2.   Homologous Series of the Low Alcohols

In a homologous series, the analytes differ from each other only by additional CH2 groups. This allows a systematic variation of the size of the analytes with other molecular properties like polarizability or polarity being nearly constant. In this study the alcohols methanol, ethanol, 1-propanol and 1-butanol are measured with the microporous polymer Makrolon as sensitive layer of different setups. The differences of the analyte sizes (0.068 nm3 to 0.180 nm3) allow a systematic investigation of the quantification based on different kinetics of sorption into and desorption out off the micropores of Makrolon. The mixtures of the analytes were generated by thermo-controlled bubblers filled with pure liquid analytes sorbed in chromosorb and a subsequent gas mixing station with the same path length for all analytes.

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