Quant. anal. in cyclic derivative chronopotentiometry with if-E curve is based on measurement of the height of peak on the if-E curve. The main advantage of the method over the classical dE/dt-E curve method is in its accuracy and sensitivity. In this paper, Tl+, Pb2+, Cd2+, Zn2+, Mn2+, and Ga3+ were determine with the microcomputer-based electrochem. data acquisition system, which was constructed in the laboratory Experimental results have shown that in the if-E curve method the accuracy is 2 to 5 times better and the sensitivity is one order of magnitude higher.

Key words: OSCILLOSCOPIC POLAROGRAPHY, QUANTITATIVE ANALYSIS, ZINC, MANGANESE, CADMIUM, TITANIUM, LEAD, CURVE, GALLIUM