ELEMENTOS TRAÇO EM PEIXES DE INTERESSE COMERCIAL DO RIO CAIAPÓ (GOIÁS - BRASIL) EM ÁREA SOB IMPACTO AMBIENTAL

Abstract

In this paper was quantified the elements concentrations in seventy-seven specimens of fishes classified in five species with different guild trophic from Caiapó river, western State of Goiás, Central Brazil. The fish sample includes carnivore species (Pseudoplatystoma fasciatum and Sorubim lima), detritivores (Prochilodus nigricans and Curimata amazonica), and herbivore (Myleus torquatus). Levels of the elements Ca, Ba, Hg, B, Me, Pb, Sb, Au, If, Mg, Cd, Al, Cr, Cu, Fe, Mn, Ni and Zn in the digested samples musculatures of fish had been quantified by spectroscopy of atomic emission by plasma of induced argon (ICP OES). The levels of Se had been determined by the technique of generation of an hidreto connected to the spectroscopy of atomic emission by plasma of induced argon (HG - ICP OES). Whereas the levels of Na and the K had been determined by spectroscopy of atomic emission in flame (AAS). The relative data of Pb had demonstrated a potential contamination in the (Curimata amazonica) and the levels in (Myleus torquatus) for Cr had been superior to the established ones by Brazilian legislation. In accordance with correlations matrices the carnivorous had demonstrated higher diversity of trace elements in its musculature. For the other analyzed elements we had evidenced that the consumption does not present risks, therefore the values are inside a quality established by law.