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RESEARCH ARTICLE
Contents Vol 62(12)

A Highly Selective Luminescent Sensor for Detecting Mercuric Ions in Water

Sofian M. Kanan A C , Imad A. Abu-Yousef A , Nora Hassouneh A , Ahmed Malkawi B , Naser Abdo A and Marsha C. Kanan A
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- Author Affiliations

A Department of Chemistry, American University of Sharjah, PO Box 26666, Sharjah, United Arab Emirates.

B Department of Chemistry, Northwest Missouri State University, 800 University Drive, Maryville, MO 64468, USA.

C Corresponding author. Email: skanan@aus.edu

Australian Journal of Chemistry 62(12) 1593-1599 https://doi.org/10.1071/CH09048
Submitted: 23 January 2009  Accepted: 18 April 2009   Published: 10 December 2009

Abstract

A chemoluminescent sensor utilizing the substrate 2,6-pyridinedicarboxaldehydebis(o-hydroxyphenylimine) (S1) was developed for low-concentration detection of mercuric ions in aqueous solutions. The sensor selectively detects mercury in the presence of sodium, calcium, magnesium, and iron ions. A strong binding was observed between the mercuric ions and the substrate at a pH range of 6.5–7.5, which makes the substrate a distinctive luminescence sensor for detecting mercury at ambient conditions. The sensor shows a linear response towards Hg2+ in the concentration range 5.0 × 10–5 to 2.5 × 10–8 M with a limit of detection of 5.0 × 10–8 M. The sensor can also detect zinc ions at a pH of 10 or higher. The results indicate that this sensor has a promising future for the detection of mercury in real environmental water samples.


Acknowledgement

Acknowledgement is made of the American University of Sharjah and of North-west Missouri State University for supporting the present research.


References


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