Conducting polymer-based optical sensor for heavy metal detection in drinking water

Sutapa Chandra; Soumyo Mukherji

doi:10.1117/12.2306719

9 May 2018 Conducting polymer-based optical sensor for heavy metal detection in drinking water

Sutapa Chandra, Soumyo Mukherji

Proceedings Volume 10680, Optical Sensing and Detection V; 106801A (2018) https://doi.org/10.1117/12.2306719
Event: SPIE Photonics Europe, 2018, Strasbourg, France

Abstract

Polyaniline (PAni), the conducting polymer, has been investigated for decades, and has been explored extensively for electrochemical applications based on the fact that the conductivity and conformation of PAni changes with its protonation-deprotonation effects. We studied a phenomenon, i.e. change in the optical characteristics of PAni without explicit protonation or de-protonation, rather due to interaction of immunoglobulin (IgG) with heavy metal ions on its surface. The present study aims to incorporate PAni as a detection matrix to develop evanescent wave absorbance based fibre-optic sensor for detection of heavy metals in drinking water. Empirical study showed heat treated IgG exhibits more affinity towards heavy metal ions compared to native IgG. Binding of heavy metals (arsenic, lead, mercury and cadmium) to IgG showed spectroscopic alteration of PAni which was utilized to develop a cost-effective fibre-optic heavy metal sensor. The study was accomplished using an experimental set up consisting of a white light source, optical fiber and a spectrometer. The preliminary experiments were carried out with 10 ppb of arsenic, lead, mercury and cadmium and significant response was observed for each of the heavy metals. Interference of the sensor with other normal ions for e.g. potassium, sodium, magnesium, manganese, iron and zinc were also tested. The current investigation represents a significant step to fabricate highly sensitive optical

Conference Presentation

Citation Download Citation

Sutapa Chandra and Soumyo Mukherji "Conducting polymer-based optical sensor for heavy metal detection in drinking water", Proc. SPIE 10680, Optical Sensing and Detection V, 106801A (9 May 2018); https://doi.org/10.1117/12.2306719

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available