A Simple, Low-Cost Double Beam Spectrophotometer for Colorimetric Detection of Nitrite in Seawater
Gong, WD, Mowlem, M, Kraft, M and Morgan, H (2009) A Simple, Low-Cost Double Beam Spectrophotometer for Colorimetric Detection of Nitrite in Seawater. IEEE SENSORS JOURNAL, 9, 862-869.
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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 mu M.
|Additional Information:||Imported from ISI Web of Science|
|Divisions:||Faculty of Physical Sciences and Engineering > Electronics and Computer Science > NANO
|Date Deposited:||21 Apr 2010 07:46|
|Last Modified:||27 Mar 2014 20:15|
|Further Information:||Google Scholar|
|ISI Citation Count:||3|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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