Issue 5, 2002
From the journal:

Journal of Environmental Monitoring

A highly sensitive hexachromium monitor using water core optical fiber with UV LED

Shiquan Tao,*a   Christopher B. Winstead,a   Hui Xiana  and  Krunal Sonia  

* Corresponding authors

a Diagnostic Instrumentation and Analysis Laboratory, Mississippi State University, 205 Research Blvd., Starkville, USA
E-mail: tao@dial.msstate.edu

Abstract

A simply structured, cheap hexachromium monitor was developed. The monitor is based on UV/VIS absorption technique. A 2-m long water core optical fiber was employed as a long path length sample cell and a UV light emitting diode (LED) was used as a light source. The emission profile of the UV LED fits very well with the absorption spectrum of chromate ions in water. Therefore, the light-dispersing element, which is usually used in an optical spectrometer, is not necessary in this monitor design. The water core fiber as a long path length makes the monitor highly sensitive for hexachromium detection. This monitor is specific for hexachromium detection without interference from tri-valence chromium ions. A detection limit of 0.1 ng Cr(VI) ml−1 was obtained with this simple monitor.

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Article information

DOI
https://doi.org/10.1039/B204286J
Article type
Paper
Submitted
03 May 2002
Accepted
11 Jul 2002
First published
05 Sep 2002

J. Environ. Monit., 2002,4, 815-818

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A highly sensitive hexachromium monitor using water core optical fiber with UV LED

S. Tao, C. B. Winstead, H. Xian and K. Soni, J. Environ. Monit., 2002, 4, 815 DOI: 10.1039/B204286J

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