1989 Volume 5 Issue 3 Pages 275-279
The polarographic determination of 5-chloro-7-iodo-8-quinolinol (ClIoxine) and its homologues has been carried out in N, N-dimethylformamide. ClIoxine and its related compounds each give at least one irreversible reduction wave. ClIoxine itself has three reduction waves in d.c. polarography and the corresponding reduction peaks in square wave polarography. The first reduction wave shows a two-electron reduction step, and the subsequent ones have one-electron steps. The wave height of the first d.c. wave is proportional to the concentration of ClIoxine down to 10-4mol/dm3, and the square-wave peak is also proportional to the concentration in the range 6×10-6-1.7×10-4mol/dm3. The related compounds 5-chloro-8-quinolinol and Ferron can be determined in the same manner.
