A Portable Sensor System for Measurement of Fluorescence Indices of Water Samples

Dissolved organic matter (DOM) plays an important role in biological, physical and chemical processes in water ecosystems. Different characteristics of DOM, such as origin or formation, can be determined by different fluorescence indices. A portable instrument for field measurement of the fluorescence index (FIX) and the biological index (BIX) on water samples has been developed and characterized. The developed sensor system was tested under different scenarios and showed a sufficient performance where the typical measurement results differed less than ±10% from results achieved by a stationary laboratory fluorescence spectrometer.