Abstract − Analytical Sciences, 19(12), 1687 (2003).
Determination of Nitrite by Flow Injection Spectrophotometry Using a Home-made Flow Cell Detector
Shizuko HIRATA,* Bhavaniamma Vijayalekshmi AMMA,* Sathrugnan KARTHIKEYAN,* and Kei TODA**
*Marine Resources and Environment, National Institute of Advanced Industrial Science and Technology (AIST), 2-2-2 Hiro-suehiro, Kure 737-0197, Japan
**Department of Environmental Sciences, Faculty of Sciences, Kumamoto University, Kurokami, Kumamoto 860-8555, Japan
**Department of Environmental Sciences, Faculty of Sciences, Kumamoto University, Kurokami, Kumamoto 860-8555, Japan
A simple, rapid, low cost and accurate determination using flow injection spectrophotometry with a home made flow cell detector, in combination with green LED and photodiode, had been developed for nitrite based on the Griess-Saltzman reaction, measuring the absorbance at 525 nm. The proposed system is able to monitor nitrite in freshwater samples at a throughput of 60 samples per hour with a relative standard deviation (%RSD) of less than 2.4% and a detection limit of <7 μg dm-3. The calibration graph was linear between 0.010 - 1.0 mg dm-3.
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