Voltammetric behavior of sulfadimetoxol using square-wave and adsorptive stripping square-wave techniques

The voltammetric behavior of sulfadimetoxol (SDX) was studied by square-wave techniques, leading to two methods for its determination in aqueous samples and veterinary formulations. The application of the square-wave mode shows the determination of SDX between 1 x 10(-7) hi and 2x10(-6) M at -0.60 V and for the stripping voltammetry of adsorbed SDX with an accumulation step of 15 s proved to be more sensitive, yielding signals five times larger than those obtained without the accumulation. The determination of SDX was done between 2 x 10(-8) M and 5 x 10(-7) M by stripping mode. The relative standard deviations obtained for concentration levels of SDX as low as 3 x 10(-7) M with square-wave was 3.4 % (n = 8) and for 2 x 10(-7) M with stripping square-wave was 3.1 % (n = 8). The methods were satisfactorily applied for determining SDX in four veterinary products.