Abstract:
The purpose of this work was to study several substances as ionophores
for PVC matrix electrodes, sensitive to the presence of Cr3+ ions. The best
results showed the electrode based on N1N5-bissalicillidene-S-
methylizothiocarbohydrazone ionophore. Measurements were made in
different Cr3+ salt solutions, but those in Cr2(SO4)3 solutions proved to be the
most successful:S = -20.2 mV / decade L.D = 1·10-4. Optimum pH range 0 to 2.