In Situ Water Quality Monitoring Using an Optical Multiparameter Sensor Probe.

Area of Science:

• Environmental Science
• Analytical Chemistry
• Spectroscopy

Background:

• Optical methods like UV/Vis and fluorescence spectroscopy are vital for in situ water quality monitoring.
• Existing portable probes often lack user-configurable specifications and data processing capabilities.
• Real-time results from these techniques enable rapid responses to water quality changes.

Purpose of the Study:

• To develop a flexible, submersible sensor probe integrating UV/Vis and fluorescence spectroscopy.
• To create a modular sensing system with adaptable hardware and software for diverse applications.
• To enable customized data processing for enhanced in situ water quality analysis.

Main Methods:

• Development of a submersible sensor probe with a 100 mm diameter waterproof enclosure.
• Integration of UV/Vis spectroscopy using a miniaturized deuterium-tungsten light source (200-1100 nm).
• Incorporation of fluorescence spectroscopy with a four-LED array light source.
• Utilisation of a miniaturized spectrometer (225-1000 nm) for complete spectral detection.

Main Results:

• Successful integration of UV/Vis and fluorescence spectroscopy in a single submersible probe.
• Demonstration of a modular hardware and software design for application-specific modifications.
• Capability to detect a broad range of biological and chemical contaminants in real-time.
• The probe's dimensions are suitable for groundwater monitoring wells.

Conclusions:

• The developed sensor probe offers a flexible and customizable solution for in situ water quality monitoring.
• The modular design enhances adaptability for various environmental sensing applications.
• Real-time spectral analysis provides rapid insights into water contamination levels.