Salt bridge for field redox potential measurements

Abstract

Conventional redox potential measurements in the field frequently become erratic during the summer season due to low moisture contents in the surface soil. A KCl‐salt bridge which circumvents this problem was designed for in situ, long‐term, nondestructive redox determinations in the subsoil. Measurements are rapid, and redox values are not affected by the use of the salt bridge, irrespective of depth of measurement.