A kind of method of three nitrogen amidine contents in measure dairy products

The invention provides a kind of method for determining three nitrogen amidine contents, it is characterised in that：Using three nitrogen amidines in organic solvent SPE determinand, its content is determined using liquid chromatography mass combination method.The pre-treating method of the Acidifying acetonitrile mechanical shaking extraction SPE column purification that the present invention is provided has quick, and selectivity is strong, the characteristics of pollute small, test limit is low.The present invention can realize the measure of three nitrogen amidine contents in milk and milk powder.