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Continuous flow determination of nitrite with membrane separation/chemiluminescence detection
1Laboratory of Environmental Chemistry, College of Engineering, University of Osaka Prefecture, Sakai, Japan.
Biomedical Chromatography : BMC
|May 1, 1990
Summary
This study introduces a new method for detecting nitrite in water using membrane separation and chemiluminescence. The technique accurately quantifies nitrite levels with high precision and rapid results.
Area of Science:
- Environmental Chemistry
- Analytical Chemistry
Background:
- Accurate nitrite determination is crucial for water quality assessment.
- Existing methods may have limitations in sensitivity or speed.
Purpose of the Study:
- To develop a sensitive and rapid method for nitrite determination in water.
- To utilize membrane separation and chemiluminescence for enhanced detection.
Main Methods:
- A microporous poly(tetrafluoroethylene) tube was used for gas-phase separation of nitric oxide.
- Air-stripping and air-carrier were employed to improve separation efficiency.
- Chemiluminescence detection was based on the reaction of nitric oxide with ozone.
Main Results:
- The method demonstrated a linear response for nitrite concentrations from 10 ppb to 5 ppm.
- High precision was achieved with a relative standard deviation of 0.7% at 0.1 ppm.
- A stable signal was obtained within 1.5 minutes of sample flow initiation.
Conclusions:
- The proposed method offers a reliable and efficient approach for nitrite analysis in water.
- The combination of membrane separation and chemiluminescence provides excellent sensitivity and speed.
- This technique is suitable for routine water quality monitoring.