A simple low cost double beam spectrophotometer for colorimetric detection of nitrite in seawater
Gong, Weidong, Mowlem, Matt, Kraft, Michael and Morgan, Hywel (2009) A simple low cost double beam spectrophotometer for colorimetric detection of nitrite in seawater. IEEE Sensors Journal, 9, (7), 862-869.
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.
|Divisions:||Faculty of Physical and Applied Science > Electronics and Computer Science > NANO
|Date Deposited:||21 Apr 2010 13:34|
|Last Modified:||26 Apr 2013 04:54|
|Contributors:||Gong, Weidong (Author)
Mowlem, Matt (Author)
Kraft, Michael (Author)
Morgan, Hywel (Author)
|Further Information:||Google Scholar|
|ISI Citation Count:||3|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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