Print version ISSN 0100-4042
MOHR, Susana et al. Determination of polychlorinated biphenyls in umbilical cord serum by acid hydrolyze extraction followed by gas chromatography with micro-electron-capture detection. Quím. Nova [online]. 2011, vol.34, n.3, pp. 444-449. ISSN 0100-4042. http://dx.doi.org/10.1590/S0100-40422011000300015.
The present work describes the determination of polychlorinated biphenyls in 123 umbilical cord serum samples by liquid-liquid extraction method with acid hydrolyze step and analysis by GC-mECD. The analytical method was evaluated with following figures of merit for all PCBs: linearity (>0.997); precision (<12.55%); recoveries (73-119%); limit of detection (0.1 ng mL-1); limit of quantification (0.25-0.5 ng mL-1). The results showed high contamination in the analyzed samples. PCB more frequent was 138 (66.7%), followed by 180 (55.3%) and 52 (51.3%).
Keywords : PCBs; umbilical cord; gas chromatography.