An electrochemical monitor for studying the kinetics of solid-liquid surface adsorption in seawater

This paper proposes a new device in which a single-sweep oscillographic polarograph can be used for the in-situ monitoring of the concentration of metal ions in stirred suspension systems. Usually, polarography is used in static solutions to avoid the effects of vibration. The device works as follows: in the standing time the device is opened to the stirred system and the concentration is homogeneous inside and outside the device. The device is closed before potential scanning of the dropping mercury electrode, so that the solution within it remains static and the polarographic measurement can be carried out. The influence of oxygen is minimized by use of the second-order derivative mode in the polarographic determination. This technique has the advantages of simplicity, speed and reproducibility.