Contamination of polychlorinated biphenyls in honey from the Brazilian state of Rio Grande do Sul.

Persistent organic pollutants are characterised by their chemical structure, environmental persistence and toxicity to human and wildlife populations. The production of these chemicals is regulated and restricted. However, they continue to be detected in the environment.

Analytical method validation to evaluate dithiocarbamates degradation in biobeds in South of Brazil.

In order to evaluate the efficiency of biobeds on DTC degradation, the aim of this study was to apply, optimize and validate a method to determine dithiocarbamate (mancozeb) in biobeds using gas chromatography-tandem mass spectrometry (GC-MS). The DTC pesticide mancozeb was hydrolysed in a tin (II) chloride solution at 1.5% in HCl (4 mol L), during 1 h in a water bath at 80 °C, and the CS formed was extracted in isooctane.