Veterinary Medicines and Feed Additives

The natural pesticides should not be disregarded in the risk assessment. Ames and Gold (2000) 

The current practice in animal husbandry is the wide use of veterinary medicines, which serve not 

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Since tetracyclines are commonly used as veterinary medicines and feed additives, a TLC method for analyzing TC, OTC, CTC, and DC in animal tissues and liver was developed (51). In this method 5 g samples were blended with 20,20, and 10 ml of 0.1 M Na2EDTA-Mcllvaine buffer pH 4.0 and centrifuged each time. The supernatants were applied to a pretreated C g cartridge, washed with 20 ml of water, air-dried for 5 min, and eluted with 10 ml of ethyl acetate followed by 20 ml of 2-propanol, and the residue dissolved in 0.1 ml of methanol. Then 1-10 xl of sample and standard solutions were spotted on a silica gel HPTLC plate with concentrating zone (Merck predeveloped with a saturated aqueous Na2EDTA solution) and 1-20 pi on an RP-8 plate (Merck). The solvents were (47), and 1 (48), respectively. 

Residues from livestock and poultry husbandry (veterinary medicinals and feed additives). 

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