Continuous Automatic Determination of Ferrocyanide Ion in Salt by Flow Injection Analysis （FIA）

Abstract

A flow injection analysis （FIA） method is presented as a means of reducing the workload required to determine hexacyanoferrate （II） （ferrocyanide） in salt. This method is based on the detection reaction of adsorbed ferrocyanide to Fe （III） complex with 1,10-phenanthroline. Automated analytical systems have been developed in which the sample injection and change of the flow path are automated. In addition, we investigated the appropriate concentration and pH of the sample solution, as well as the influence of the ferroin concentration. As a result, the FIA method described in this paper successfully determined the ferrocyanide ion in commercial salt.