Direct titration of glycerol by constant current potentiometry.
A direct, constant-current potentiometric titration method allows quantitative determination of 0.50-5.00 mg samples of glycerol in aqueous solution with errors ranging from 0.2% for the large samples to 2.0% for the smaller samples. Perchloratocerate is used as the standard oxidant and pyrolytic graphite as the electrode material. A direct determination is made possible by elevated temperatures, high acidity, and a relatively large constant current. Sources of error and possible interferences are discussed.
Sand
J R
JR
Department of Chemistry, University of Wisconsin-Milwaukee, Wisconsin 53201, U.S.A.
Huber
C O
CO