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A Rapid, Naked-Eye Detection of Hypochlorite and Bisulfite Using a Robust and Highly-Photostable Indicator Dye Quinaldine Red in Aqueous Medium

A Rapid, Naked-Eye Detection of Hypochlorite and Bisulfite Using a Robust and Highly-Photostable Indicator Dye Quinaldine Red in Aqueous Medium

Tanoy Dutta, Falguni Chandra, Apurba L Koner

Spectrochim Acta A Mol Biomol Spectrosc. 2018 Feb 15;191:217-220.

PMID: 29040926

Abstract:

A "naked-eye" detection of health hazardous bisulfite (HSO3-) and hypochlorite (ClO-) using an indicator dye (Quinaldine Red, QR) in a wide range of pH is demonstrated. The molecule contains a quinoline moiety linked to an N,N-dimethylaniline moiety with a conjugated double bond. Treatment of QR with HSO3- and ClO-, in aqueous solution at near-neutral pH, resulted in a colorless product with high selectivity and sensitivity. The detection limit was 47.8μM and 0.2μM for HSO3- and ClO- respectively. However, ClO- was 50 times more sensitive and with 2 times faster response compared to HSO3-. The detail characterization and related analysis demonstrate the potential of QR for a rapid, robust and highly efficient colorimetric sensor for the practical applications to detect hypochlorite in water samples.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP117920	Quinaldine Red		117-92-0	Price

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