CHEMICAL PROCEDURE FOR THE IDENTIFICATION OF UNWANTED FEEDSTUFFS OF ANIMAL ORIGIN IN FISH MEAL

摘要

Chemical procedure for the determination of fish meal falsification with some other feeds of animal origin is in fact a procedure that can be applied for quality control of livestock feed in order to determine falsification of fish meal by mixing an animal feed of lower value into fish meal. The procedure is based on the existence of the differences in in vitro levels of protein digestibility of fish meal, this is, meat-bone meal meal from hydrolized feather of some other animal feed, with the differences of in vitro protein digestibility of animal feeds being higher if the feed is subjected to the investigation in a series of acid solutions (0,075 mol/L HCl) of pepsine with lower concentrations (0.2%, 0.002% and 0.0002%) than standard prescribed concentration (0.2%). The value of in vitro digestibility of animal feed in acid solution (0.075 mol/L HCl) of pepsin in concentration of 0.0002% is relevant for determination of fish meal falsification.