Statistical Methods for Selecting the Components of a Sensing Array

  • Margie L. Homer
  • Hanying Zhou
  • April D. Jewell
  • Margaret A. Ryan
Part of the Integrated Analytical Systems book series (ANASYS)


An electronic nose which uses an array of conductometric chemical sensors has been developed at the Jet Propulsion Laboratory; the JPL Electronic Nose is to be used as an event monitor in human habitat in a spacecraft. This sensor array is designed to identify and quantify 10–15 organic and inorganic species in air. The earlier generation/version JPL electronic noses consisted of 32 polymer-carbon black composite sensors; the target analytes included volatile organics as well as ammonia. This third generation electronic nose has a new suite of target analytes, and so, a new set of sensors was selected. In addition to volatile organic chemicals, the target analytes include the inorganic species: ammonia, sulfur dioxide and elemental mercury. The most recent array under development has 32 sensors; additional materials were selected in order to detect inorganic species and polymer-carbon black composite sensors were reevaluated. In the development of such a device, we must select sensors suitable for the detection of targeted analytes, and we must be able to evaluate both the sensors and the array response. This chapter will discuss the statistical tools and experimental criteria used to evaluate and select materials in the sensing array.


Sensor Response Target Analytes Sensor Array International Space Station Ethyl Cellulose 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



The work discussed here was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA). Work was sponsored by Advanced Environmental Monitoring and Control Project of the Exploration Systems Mission Directorate.


  1. 1.
    Nicagossian, A. E.; Hunton, C. L.; Pool, S. L., Space Physiology and Medicine, Lea and Febiger, Philadelphia, PA, 1994 Google Scholar
  2. 2.
    Ryan, M. A.; Homer, M. L.; Zhou, H.; Manatt, K. S.; Ryan, V. S.; Jackson, S. P., Operation of an electronic nose aboard the space shuttle and directions for research for a second generation device, In Proceedings of International Conference on Environmental Systems, 2000, 00ICES-259, Toulouse, FranceGoogle Scholar
  3. 3.
    Ryan, M. A.; Zhou, H.; Buehler, M. G.; Manatt, K. S.; Mowrey, V. S.; Jackson, S. P.; Kisor, A. K.; Shevade, A. V.; Homer, M. L., Monitoring space shuttle air quality using the jet propulsion laboratory electronic nose, IEEE Sens. J. 2004, 4, 337–347CrossRefGoogle Scholar
  4. 4.
    Ryan, M. A.; Homer, M. L.; Zhou, H.; Manatt, K.; Manfreda, A., Toward a second generation electronic nose at JPL: sensing film optimization studies, In Proceedings of International Conference on Environmental Systems, 2001, 2001–01–2308, Orlando, FLGoogle Scholar
  5. 5.
    Ryan, M. A.; Homer, M. L.; Zhou, H.; Manatt, K.; Manfreda, A.; Kisor, A.; Shevade, A.; Yen, S. P. S., Expanding the capabilities of the JPL electronic nose for an international space station technology demonstration, J. Aerosp. SAE Trans. 2006, 2006–01, 225–210Google Scholar
  6. 6.
    Shevade, A.V.; Ryan, M. A.; Taylor, C. J.; Homer, M. L.; Jewell, A. D.; Kisor, A. K.; Manatt, K. S.; Yen, S. -P. S., Development of the third generation JPL electronic nose for international space station technology demonstration, In Proceedings of International Conference on Environmental Systems, 2007, 2007–01–3149, Chicago IL, USAGoogle Scholar
  7. 7.
    Zhou, H.; Homer, M. L.; Shevade, A. V.; Ryan, M. A., Nonlinear least-squares based method for identifying and quantifying single and mixed contaminants in air with an electronic nose, Sensors 2006, 6, 1–18CrossRefGoogle Scholar
  8. 8.
    Nix, M. B.; Homer, M. L.; Kisor, A. K.; Soler, J.; Torres, J.; Manatt, K.; Jewell, A.; Ryan, M. A, Sniffing out problems for humans in space, IEEE Potentials 2007, 26, 18–24CrossRefGoogle Scholar
  9. 9.
    Ryan, M. A.; Homer, M. L.; Zhou, H.; Manatt, K.; Manfreda, A.; Kisor, A.; Shevade, A.; Yen, S. P. S., Expanding the analyte set of the JPL electronic nose to include inorganic species, J. Aerosp. SAE Trans. 2005, 2005–01–2880, 225Google Scholar
  10. 10.
    Diaf A.; Garcia J.I.; Beckman, E.J.,Thermally reversible polymeric sorbents for acid gases – CO2, SO2, and NOx, J. App. Polym. Sci. 1994, 53, 857–875Google Scholar
  11. 11.
    Ruys, D. P.; Andrade, J. F.; Guimaraes, O. M., Hg detection in air using a coated piezoelectric sensor, Anal. Chim. Acta 2000, 404, 95–100CrossRefGoogle Scholar
  12. 12.
    Shevade, A. V.; Ryan, M. A.; Homer, M. L.; Kisor A. K.; Manatt, K. S., Off-gassing and particle release by heated polymeric materials, In Proceedings of 38th International Conference on Environmental Systems 2008, 2008–01–2090, San Francisco CA, USAGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Margie L. Homer
    • 1
  • Hanying Zhou
    • 1
  • April D. Jewell
    • 2
  • Margaret A. Ryan
    • 1
  1. 1.Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadenaUSA
  2. 2.Tufts University Chemistry DepartmentMedfordUSA

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