Evaluation of flow injection analysis based method for in situ chemical measurements

摘要

This work constitutes a preliminary study for the development of a submersible chemical analyser based on FIA. A method based on a reverse FIA manifold and differential dual wavelength absorbtiometry is proposed in order to eliminate the refractive index interference and to achieve the sensitivity and accuracy needed for nitrate analysis in coastal seawater. Characterization of the effects of variations in simulated environmental conditions (salinity, temperature, pressure) on the measurements confirms the interest of this approach.