nerc.ac.uk

A Simple, Low-Cost Double Beam Spectrophotometer for Colorimetric Detection of Nitrite in Seawater

Gong, Weidong; Mowlem, Matt; Kraft, Michael; Morgan, Hywel. 2009 A Simple, Low-Cost Double Beam Spectrophotometer for Colorimetric Detection of Nitrite in Seawater. IEEE Sensors Journal, 9 (7). 862-869. 10.1109/JSEN.2009.2020659

Full text not available from this repository.

Abstract/Summary

This paper reports on the optical detection system of a prototype nitrite sensor for seawater analysis. The sensor uses a colorimetric Griess reaction that produces an Azo dye with an absorption peak at 540 nm. A simple low-cost double beam spectrophotometer using a green light emitting diode (LED) light source, two integrated photo detectors and lock-in detection is described. A log-ratio amplifier is used to produce an output proportional to absorbance. The optical devices were mounted in a cast resin block to prevent shock and vibration. Experimental results show the detection system has a limit of detection of 0.1 muM.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1109/JSEN.2009.2020659
ISBN: 9781424421251
ISSN: 1530-437X
Date made live: 04 Jan 2010 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/171835

Actions (login required)

View Item View Item

Document Downloads

Downloads for past 30 days

Downloads per month over past year

More statistics for this item...