VOLTAMMETRIC BEHAVIOR OF SULFADIMETOXOL USING SQUARE-WAVE AND ADSORPTIVE STRIPPING SQUARE-WAVE TECHNIQUES

The voltammetric behavior of sulfadimetoxol (SDX) was studied by squar e-wave techniques, leading to two methods for its determination in aqu eous samples and veterinary formulations. The application of the squar e-wave mode shows the determination of SDX between 1 x 10(-7) hi and 2 x10(-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, yieldi ng signals five times larger than those obtained without the accumulat ion. 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 fo r 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.