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RESEARCH ARTICLE
Contents Vol 69(11)

A Colorimetric Approach towards Polycyclic Aromatic Hydrocarbon Sensing

Walmiria Woodland A , Cherie A. Motti B , Paul Irving C , Lynne Van Herwerden A D and George Vamvounis A E
+ Author Affiliations
- Author Affiliations

A College of Science and Engineering, James Cook University, Townsville, Qld 4811, Australia.

B Australian Institute of Marine Science, PMB no. 3, Townsville MC, Qld 4810, Australia.

C Australian Maritime Safety Authority, Braddon ACT 2612, Australia.

D Centre for Sustainable Tropical Fisheries and Aquaculture, James Cook University, Townsville, Qld 4811, Australia.

E Corresponding author. Email: george.vamvounis@jcu.edu.au

Australian Journal of Chemistry 69(11) 1292-1295 https://doi.org/10.1071/CH16176
Submitted: 22 March 2016  Accepted: 6 May 2016   Published: 4 July 2016

Abstract

The colorimetric detection of polycyclic aromatic hydrocarbons (PAHs) was achieved using photochromic compounds. This technique exploits the ability of the photochromic compound to reversibly change from a colourless to a coloured compound using ultraviolet light and visible light. In the presence of a PAH, this photoisomerization is inhibited. The degree of inhibition corresponded to the molar absorptivity and excitation wavelength of the PAH, and with a limit of detection in the micromolar range, the current method delivers a highly sensitive and selective technology. In addition, PAH mixtures were successfully identified using this method, providing a potentially fast in-field sensing technology for the identification of likely sources of spilled oil.


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