Keywords
Hg, Pb, Cd, Cu, Zn
cold vapor atomic absorption spectrometry
CV/AAS
ICP OES.
How to Cite
Abstract
Bivalves as filter-feeders and bioaccumulators of chemical and biological residues can offer risk to public health when consumed by the population. This study aims at determining Pb, Cd, Hg,
Cu and Zn levels in bivalves C. brasiliana, P. perna and Mytella falcata collected in several natural sandbanks in the coastal Baixada Santista, São Paulo. Seventy samples from twelve natural sandbanks
were collected and analyzed from September 1996 to February 1997. Mercury concentration in soft tissues of bivalves was determined by continuos flow injection – flameless atomic absorption spectrometry. Pb, Cd, Zn and Cu were determined by Inductively Coupled Plasma Optical Emission Spectrometry (ICP OES).
The results showed that Pb, Cd, Hg and Cu levels in samples were according to Brazilian legislation. The concentration of Zn for all samples of oyster C. brasiliana was higher than those indicated by legal limits for foods in Brazil, that is 50 mg/kg; for other samples the Zn levels were below the levels established for Brazilian legislation.
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