DETERMINATION OF CD, CU, PB AND ZN CONTENT OF INFANT FORMULAS BY DIFFERENTIAL-PULSE ANODIC-STRIPPING VOLTAMMETRY (DPASV)

The differential pulse anodic stripping voltammetry (DPASV) method des cribed is based on the one reported by HASSE et al., but adapted to no rmal laboratory conditions. The values obtained in the estimation of t he analytical parameters (linearity, detection and quantification limi ts, precision and accuracy) show that in the conditions described the method is sensitive enough, reliable and useful for determining these elements in infant formulas. A comparison between DPASV and atomic abs orption spectroscopy (AAS) methods in the conditions, described here s hows that the former is less sensitive but that they are similar in pr ecision. The cadmium, copper, lead and zinc contents of different type s of infant formulas marketed in Spain are reported.