Trace metals in fish from the Kuwait coast using the microwave acid digestion technique

Abstract

The concentrations of chromium, iron, copper, nickel, lead, vanadium, and zinc in fish were determined to assess the impact of petroleum-refining activities and the 1991 Gulf War. Twenty-eight species of fish from the Kuwait coast were collected 50 m apart. Sample solutions prepared were analyzed using the atomic absorption spectrophotometry technique. Results show that fish samples contain 6.2 to 6.8 μg/g Cr, 4.2 to 96.2 μg/g Cu, 18.8 to 126.4 μg/g Fe, 0.5 to 20.4 μg/g Ni, 0.2 to 14.6 μg/g Pb, 0.02 to 15.6 μg/g V, and 7.6 to 81.3 μg/g Zn. Copper, nickel, and zinc in Station I, covering the Kuwait City area, were often greatly in excess of those present in Station II, covering the Al-Ahmadi area, while chromium, iron, lead, and vanadium were greater in Station II. Significant correlations were observed between some trace metals in fishes, indicating their common association.