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A simple, fast and robust method with minimum steps, small sample size and amounts of solvents was developed to determine major carotenoids contents in processed foods, tablets and gel capsules. The method involves dispersion of the sample in hot water (60°C) with added butylated hydroxytoluene (BHT) in ethanol to minimize oxidation, followed by extraction with chloroform and analysis by liquid chromatography...
The existing method for analysis of chloramphenicol (CAP) residues in animal tissues was optimized to extract spiked-labelled and unlabelled chloramphenicol from freeze-dried egg albumen and yolks. Although recoveries of CAP were essentially the same for both albumen and yolk, the standard deviation was narrow for albumen compared to yolk. There was no statistical difference in recoveries of spiked...
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