Colorimetric Sensor Array for Qualitative Water Analysis

Shu Ann Chan; Jun-Seok Lee; Young-Tae Chang

doi:10.1071/CH09289

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Colorimetric Sensor Array for Qualitative Water Analysis

Shu Ann Chan ^A , Jun-Seok Lee ^B and Young-Tae Chang ^A ^C ^D ^E

+ Author Affiliations

- Author Affiliations

^A Department of Chemistry, National University of Singapore, 117543, Singapore.

^B Department of Chemistry, New York University, New York, NY 10003, USA.

^C NUS MedChem Program of the Office of Life Sciences Institute, National University of Singapore, 117543, Singapore.

^D Laboratory of Bioimaging Probe Development, Singapore Bioimaging Consortium, Agency for Science, Technology and Research (A*STAR), Biopolis, Singapore 138667, Singapore.

^E Corresponding author. Email: chmcyt@nus.edu.sg

Australian Journal of Chemistry 62(9) 1040-1046 https://doi.org/10.1071/CH09289
Submitted: 14 May 2009 Accepted: 23 July 2009 Published: 17 September 2009

Abstract

A chemosensor array comprising 45 off-the-shelf colorimetric dyes, dubbed the Singapore Tongue (SGT), that is capable of discriminating different brands of bottled water and waters of different geographical attribute is described. Twelve kinds of bottled waters were tested by the SGT, and changes of absorbance spectra were analyzed by unsupervised classification methods to validate the SGT system for water analysis. All 12 bottled waters were discriminated at 1 × concentration, and SGT could distinguish the identity of samples of the waters diluted up to 100 times, except distilled waters. Following the study of 63 tap waters in different mass rapid transit stations in Singapore, two distinct clusters were observed from a principal component analysis plot, which correspond to the origin of the tap water. The successful discrimination and identification of in this study demonstrates the practical application of the SGT as a simple tool for water analysis.

Acknowledgement

We gratefully acknowledge the National University of Singapore (NUS) for financial support (Young Investigator Award: R-143-000-353-123). J.-S.L. was supported by a Korea Research Foundation Grant funded by the Korean Government (MOEHRD, Basic Research Promotion Fund: KRF-2005-C00088).

References

Colorimetric Sensor Array for Qualitative Water Analysis

Abstract

Acknowledgement

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