Ovarian Hormone Estrone Glucuronide (E1G) quantification-impedimetric electrochemical spectroscopy approach

Asif I. Zia, S. C. Mukhopadhyay, P. L. Yu, I. H. Al-Bahadly, Anton Yudhana, C. Gooneratne, Jurgen Kosel

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

7 Citations (Scopus)


A study was conducted on detection and concentration measurement of estrone glucuronide (E1G), an important metabolite of the ovarian hormone estradiol, by using Electrochemical Impedance Spectroscopy (EIS) technique. A miniature planar Inter-digital (ID) capacitive sensor fabricated on single crystal silicon substrate with sputtered gold electrodes coupled with EIS was used to measure conductivity, permeability and dielectric properties of the said hormone metabolite. A thin film of Silicon Nitride (50 um) was coated on the sensor as passivation layer to avoid Faradic currents through the sensor. Impedance spectrums were obtained with various concentrations of E1G in buffer solution by exposing the samples to electrical perturbations at certain frequency range. Relationship of sample conductance with E1G concentration was studied on basis Randle's equivalent circuit model and results were analyzed to deduce Constant Phase Equivalent (CPE) Circuit model in order to evaluate the double layer capacitance produced at the solution-electrode interface due to kinetic processes taking place in the electrochemical cell. The sensitivity of the sensor was evaluated against concentration. The result analysis confirmed that fabricated ID sensor together with EIS can provide a rapid and successful low cost sensing system which can help a lay user to determine peak time for feminine reproductive fertility at home without submitting samples for an expensive and time consuming laboratory test.

Original languageEnglish
Title of host publication2013 Seventh International Conference on Sensing Technology (ICST)
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages6
ISBN (Print)9781467352215
Publication statusPublished - 2013
Externally publishedYes
Event2013 7th International Conference on Sensing Technology, ICST 2013 - Wellington, New Zealand
Duration: 3 Dec 20135 Dec 2013


Other2013 7th International Conference on Sensing Technology, ICST 2013
Country/TerritoryNew Zealand


  • dielectric
  • E1G
  • electrochemical
  • estrone glucuronide
  • Impedance spectroscopy
  • Interdigital
  • MEMS
  • sensing performance
  • sensors


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