Portable Battery-Powered Monitor for Nitrate in Water
Author Information
Author(s): N. J. Blundell, A. Hopkins, P. J. Worsfold, H. Casey
Primary Institution: Department of Environmental Sciences, University of Plymouth
Hypothesis
The study aims to develop a portable, automated flow injection monitor for measuring nitrate levels in natural waters.
Conclusion
The study demonstrates that the portable flow injection monitor can accurately measure nitrate levels in freshwater over a range of 0 to 12 mg 1-1.
Supporting Evidence
- The monitor can operate unattended for over a week while providing accurate results.
- It has a limit of detection of 0.05 mg 1-1 for nitrate.
- The system is designed to minimize power consumption and maximize portability.
- The calibration of the monitor is linear over the range of 0 to 12 mg 1-1 nitrate.
Takeaway
This study created a small device that can check how much nitrate is in water without needing to send samples to a lab.
Methodology
The monitor uses a cadmium reduction/diazotization method to analyze nitrate levels and operates using a microcontroller for automation.
Limitations
The monitor's performance may be affected by external light and requires careful calibration to ensure accuracy.
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