Determination of Manganese, Iron, Zinc, Copper and Nickel in Tilapia and Cyprinus carpio Fish Consumed in Syria by Flame Atomic Absorption Spectrometry

Abstract

The present work describes a microwave digestion procedure by using new convenient digestion mixture (nitric acid and hydrogen peroxide) to determine manganese, zinc, copper, iron and nickel in (Tilapia and Cyprinus carpio) fish samples, breeding in artificial lakes, employing flame atomic absorption spectrometry. The optimization conditions involving the factors: amount of fish, microwave power and power time were studied. The experiments of this factorial were carried out using two species of local fish which are common consumed in Syria. The proposed method was used to determine the precedent metals in muscle, skin and tail in the two species fish (Tilapia and Cyprinus carpio). The relative standard deviations of the method were found to be less than 5 % for the five studied elements. The concentration results for manganese, iron, zinc, copper and nickel in Cyprinus carpio fish species varied between 1.

influence of citric acid on the extraction level of manganese in green and black tea infusions

“…Brzezicha-Cirocka et al [18] reported extraction levels of 32.9 ± 12.4% for black tea and 29 ± 5.3% for green one which points out that there is no significant difference between these two types of tea. According to Antakli et al [21], however, the extraction levels were significantly different, although the number of samples tested in that work was very low (27% and 11-18% for black and green tea, respectively; N = 3) so it's difficult to draw a clear conclusion.…”