CATALYTIC WAVES PRODUCED BY THIOGLYCOLIC ACID IN THE PRESENCE OF NICKEL

In ammonia buffer the shape of the waves formed in the presence of thi oglycol acid is influenced by the relative amount of the buffer compon ents. In Ni2+, 1 X 10(-3)M, NH4Cl, 2.5 X 10(-1)M, NH3, 1 X 10(-1)M and thioglycol acid, 1 X 10(-7)M the polarogram is composed from two wave s having maxima. In Ni2+, 0.8 X 10(-3)M, NH4Cl, 1 X 10(-1)M, NH3, 1 X 10(-2)M and thioglycol acid, 7 X 10(-6)M there are also two waves, but only the second one has a round maximum. A rather different case was obtained in Ni2+, 1 X 10(-8)M, NH4Cl, 5 X 10(-1)M, NH3, 5 X 10(-1)M an d thioglycol acid, 7 X 10(-6)M; here the first wave is small and the s econd one has a very sharp maximum. The effect of several parameters o n these waves was studied.