Abstract − Analytical Sciences, 20(3), 567 (2004).
Portable Flow-Injection Analyzer for Nitrite and Nitrate in Natural Water
Shizuko HIRATA,* Sathrugnan KARTHIKEYAN,* and Tasuku KAJIYA*,**
*Marine Resources and Environment, National Institute of Advanced Industrial Science and Technology (AIST), 2-2-2 Hiro-suehiro, Kure 737-0197, Japan
**Graduate School, Kinki University, 1 Takaya-Uminobe, Higashi-Hiroshima 739-2116, Japan
**Graduate School, Kinki University, 1 Takaya-Uminobe, Higashi-Hiroshima 739-2116, Japan
A portable flow-injection analyzer with solid-state spectrophotometric detection for the determination of nitrite and nitrate is described. It utilizes the Griess-Saltzman reaction. The instrument comprises a two-channel peristaltic pump, two six-port injection valves and a mini cadmium column between them. The sample loops were connected serially. The detection limits of the method were less than 7 µg l-1 for NO2- and 10 µg l-1 for NO3-.
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