Determination of Low Levels of Nitrates in Natural Waters by Direct Potentiometry Using an Ion Selective Electrode of Improved Sensitivity

摘要

This work describes the construction and the evaluation of a nitrate potentiometric transducer with improved sensitivity and it application to the determination of low levels of nitrate in natural waters. The results obtained in these determinations were evaluated comparatively with those obtained by the conventional ion-selective electrodes and by the reference methods which include colourimetric measurement.