DETERMINATION OF ZINC CONTENT IN SOME FISH SPECIES IN GIANH RIVER AT QUANG TRACH DISTRICT, QUANG BINH PROVINCE BY ATOMIC ABSORPTION SPECTROMETY

Abstract

The flame atomic absorption spectrometry (F-AAS) has been applied to determine the zinc content in some fish species, in Gianh river at Quang Trach distric Quang Binh province. This method has high repeatability with relative standard deviation (RSD) < 2.0%, the recovery from 95 to 105 %, low limit of detection (LOD) = 0.06 ppm and limit of quantization (LOQ) = 0.20 ppm. The concentration of zinc has a good linear correlation in the concentration of 0,005 ÷ 1 ppm. Results obtained shows that the average zinc contents in the fish species were in the range of 3.803 ÷ 9.000 mg/kg wet weight and within the allowed limits according to the regulation No.46/2007/QĐ-BYT.