A Voltammetric Study of the Reactivity of Folic Acid in Algal Cultures and in Natural Waters

摘要

Folic acid (FA) can be determined in natural waters by adsorptive cathodic stripping voltammetry. The measurement suffers from in- terference due to the presence of humic acid (HA) in natural wa- ters. At 2 mg/L of HA, the peak of FA is fully suppressed. It was concluded form non -equilibrium adsorption isotherms that the ad- sorption of HA and FA is competitive, and that the folic acids is more strongly adsorbed than the HA.