Trace element content in market eggs in Bohemia
2012
Dusova, H., Jihoceska Univ., Ceske Budejovice (Czech Republic). Katedra Veterinarnich Disciplin a Kvality Produktu | Travnicek, J., Jihoceska Univ., Ceske Budejovice (Czech Republic). Katedra Veterinarnich Disciplin a Kvality Produktu | Peksa, Z., Jihoceska Univ., Ceske Budejovice (Czech Republic). Katedra Veterinarnich Disciplin a Kvality Produktu | Falta, D., Mendelova Univ., Brno (Czech Republic). Ustav Chovu a Slechteni Zvirat | Palka, V., Jihoceska Univ., Ceske Budejovice (Czech Republic). Katedra Veterinarnich Disciplin a Kvality Produktu
The aim of this study was to analytically determine the content of iodine, copper, zinc and manganese in the yolk of consumer eggs in Bohemia in 2007 and 2008. Investigated eggs originated from six intensive farms with large flocks (118 eggs) and twelve backyard farms or small-flock establishments (136 eggs) from three Czech regions. Eggs from intensive farms were obtained directly from the establishments, while eggs from backyard farms were purchased from private farmers. Spectrophotometric Sandell-Kolthoff method was used to determine I concentration in egg yolk, while Cu, Zn and Mn levels were determined by the flame absorption spectrophotometric method (AAS). The average concentrations (in mg/kg) in fresh egg yolks from intensive and backyard farms were as follows: I: 0.9+/-0.2 and 0.4+/-0.04, Cu: 8.4+/-2.1 and 10.8+/-2.9, Zn: 29.8+/-6.9 and 32.5+/-6.9, Mn: 1.2+/-0.3 and 1.5+/-0.3, respectively. Average levels of Cu, Zn and Mn were lower in egg yolks from intensive farms (P less than 0.01) than in those from backyard farms, while I level was lower in eggs from backyard farms (P less than 0.01) than in eggs from intensive farms.
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