Potential Measurement of Biological Compound Concentration using Capacitive Sensor

Authors

  • Helmi Wasoh Institute of Bioscience, Universiti Putra Malaysia, Serdang, Malaysia and Faculty Biotechnology and Biomolecular Sciences, UPM Serdang, Selangor, Malaysia.
  • Abu Bakar Salleh Institute of Bioscience, Universiti Putra Malaysia, Serdang, Malaysia and Faculty Biotechnology and Biomolecular Sciences, UPM Serdang, Selangor, Malaysia.
  • Fatimah Abu Bakar Faculty of Food Science and Technology, Universiti Putra Malaysia, Serdang, Malaysia
  • Rahman Wagiran Faculty of Engineering, Universiti Putra Malaysia, Serdang, Malaysia.
  • Yook Heng Lee Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi, Malaysia.

Keywords:

Capacitive, sensor, solution, biological compound, enzyme

Abstract

Monitoring of biological compounds related to health issue is an important activity. A device
that is low in cost, simple and portable is an advantage for biological compound monitoring.
In this work, a device was developed using a capacitance (C) concept with two plates system.
Linear relationship between frequency (f) and sample concentration was obtained proving that
the relationship between f and the dielectric constant (k) can be used to develop sensor for
biological compounds. The behavior of sample reactions can be monitored in the presence of
free enzymes in solution. By using capacitance as measurement concept linear relationship was
obtained for the concentration of histamine from 100 until 300 ppm.

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Published

2014-07-08

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Section

Articles