RESUMO
Concentrations of metals were determined in the gills, liver, kidney, heart and muscle in Capoeta umbla caught from six stations from the Munzur River system. Metal concentrations in the tissues tended to vary significantly among stations (p < 0.05). Liver (Cu, 10.10 ± 0.23-23.03 ± 9.37 ppm; Zn, 14.67 ± 3.01-21.82 ± 2.39 ppm; Cd, 18.04 ± 4.56-52.69 ± 10.65 ppb and Fe, 28.87 ± 6.78-115.11 ± 34.87 ppm) and kidney (Cu, 1.80 ± 0.25-3.70 ± 0.62 ppm; Zn, 20.81 ± 0.37-29.36 ± 0.70 ppm; Cd, 132.06 ± 5.29-639.51 ± 20.14 ppb and Fe, 24.40 ± 1.98-59.39 ± 1.97 ppm) tissues showed higher metal concentrations than other tissues. It seems that metal contamination in the river is too high for the health of fish and the people who eat them. The geographical locations of catch, season, nature of diet, and the size of fish used for analyses might lead to different metal concentration in the same fish species.
Assuntos
Cyprinidae/metabolismo , Monitoramento Ambiental , Lagos/química , Metais Pesados/metabolismo , Poluentes Químicos da Água/metabolismo , Animais , Humanos , Rim/metabolismo , Fígado/metabolismo , Músculos/metabolismo , TurquiaRESUMO
A simple, sensitive, accurate, and selective method for determination of ultratrace levels of copper is modified. The method is based on preconcentration of copper on the 4-(2-pyridyl-azo) resorcinol-loaded amberlite XAD-7 (non-ionic copoly[styrene-acrylic compound]) at pH 5.0 to 6.5 for contact time as low as 45 minutes. The adsorbed copper was eluted with concentrated nitric acid and measured by flame atomic absorption spectrometry. Recoveries of up to 90% were achieved. The optimized preconcentration method was applied to copper determination in various water samples. The detection limit was found to be 0.09 ng mL(-1). The relative standard deviation was found to be 9% using 300 mL of 5.0 ng mL(-1) for 10 replicate preconcentration procedures. Copper concentrations in the studied water samples were found to be in the ranges of 0.4 to 18.0 ng mL(-1).
