Türkiye'nin farklı bölgelerinden toplanan süt örneklerinde bazı metal düzeyleri
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Date
2009
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Sağlık Bilimleri Enstitüsü
Abstract
In the present study, the aim was to determine the levels of lead (Pb), cadmium (Cd), iron (Fe), copper (Cu) and zinc (Zn) in raw cow milk samples which were collected from six different regions of Turkey (Marmara, Black Sea, Central Anatolia, Eastern Anatolia, Mediterranean Sea and Aegean).120 samples of raw cow milk have been analyzed with respect to Pb, Cd, Fe, Cu and Zn. The samples have been collected in four phases between December 2006 and November 2007. Samples were collected in accordance with the principles of Turkish Ministry of Agriculture and Rural Affairs ?Regulations Regarding Precautions Which Have To Be Taken When Tracing Specific Substances and Their Residues in Live Animals and Animal Products? and samples have been stored in proper laboratory conditions until the analysis.Determination of the levels of heavy metals and different mineral substances in raw milk has been performed using Atomic Absorption Spectrometer. Therefore, disintegration of organic structures of samples and shaping up the samples for the analysis in the equipment was provided using microwave method.At the end of the analysis, Pb, Cd, Fe, Cu and Zn which were differing to seasons have been detected in the samples of raw cow milk. However, Pb has not been detected in 13 samples and Cd has not been detected in 102 samples, either. In terms of Pb, Fe, Cu and Zn statistical significance has been found when mean values of four phases were compared. An increase has been detected at the levels of Pb, Cd and Zn in the samples of first phase. Increases have been observed at the level of Fe in third phase and at the level of Cu in the second phase. As mean 0,008±0,009 ppm Pb; 0,00009±0,00009 ppm Cd; 0,33±0,23 ppm Cu, 0,23±0,1 ppm Fe and 3,67±0,86 ppm Zn have been detected in the samples.As a result of present study, it is observed that in terms of Pb,10 (%8,3) of the analyzed samples have gone beyond the level of maximum residues which was designated (as 0.02 mg/kg in the ?Announcement About Maximum Limits of Contaminants in Foodstuffs?; but it is observed that the general mean of Pb is below this level. Any evaluation could not have been done for other metals so that any residues limitation has not been informed.
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Keywords
Ağır metal, Atomik absorpsiyon spektrometre