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RESEARCH ARTICLE
Contents Vol 67(4)

Detection of Trace Amounts of Water in Organic Solvent by 8-Hydroxypyrene-1,3,6-Trisulfonic Acid Trisodium Salt

Sharad R. Bobe A , Aaron Michael Raynor B , Sheshanath V. Bhosale B C and Sidhanath V. Bhosale A C
+ Author Affiliations
- Author Affiliations

A Polymers and Functional Materials Division, Indian Institute of Chemical Technology, Hyderabad-500607, Andhra Pradesh, India.

B School of Applied Sciences, RMIT University, GPO BOX 2478V, Melbourne, Vic. 3001, Australia.

C Corresponding authors. Email: bhosale@iict.res.in, sheshanath.bhosale@rmit.edu.au

Australian Journal of Chemistry 67(4) 615-619 https://doi.org/10.1071/CH13381
Submitted: 24 July 2013  Accepted: 20 October 2013   Published: 5 December 2013

Abstract

A colorimetric and fluorescent sensor was developed based on 8-hydroxy-1,3,6-pyrenetrisulfonic acid trisodium salt (HPTS) for the detection of trace amounts of water in polar organic solvents. Fluorescence and UV-visible absorption spectra of HPTS were measured in a variety of organic solvents (DMF, DMSO, ethanol, methanol). Fluorescence maxima comparable with maximum/minimum ratios were determined by using UV-visible absorption spectroscopy. The HPTS sensor exhibits high sensitivity for water with a detection limit as low as 0.0001 to 0.0005 wt-%. In addition, naked-eye inspection of solutions of HPTS sensor in organic solvents before and after addition of water showed dramatic changes in colour from blue to green. These findings can be applied in the use of HPTS as a molecular probe for trace amounts of water in organic solvents.


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