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.
Download
![[img]](http://eprints.soton.ac.uk/style/images/fileicons/application_pdf.png) |
PDF
Download (1152Kb) |
Description/Abstract
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: | Article |
|---|---|
| ISSNs: | 1530-437X |
| Divisions: | Faculty of Physical and Applied Science > Electronics and Computer Science > NANO |
| Item ID: | 270887 |
| 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) |
| Date: | July 2009 |
| Status: | Published |
| Further Information: | Google Scholar |
| ISI Citation Count: | 3 |
| URI: | http://eprints.soton.ac.uk/id/eprint/270887 |
Actions (login required)
 |
View Item |
