Method for identifying ultra-high-temperature sterilized milk and reconstituted milk based on lipid group

The invention provides a method for identifying ultra-high-temperature sterilized milk and reconstituted milk based on a lipid group, which comprises the following steps:1) performing lipid extractionpretreatment on an ultra-high-temperature sterilized milk sample and a reconstituted milk sample to obtain a lipid sample; 2) performing chromatographic separation-mass spectrometry scanning on the lipid sample of the ultra-high-temperature sterilized milk and the reconstituted milk by adopting a high-resolution mass spectrometry technology; 3) extracting and filtering peaks of lipid samples of two types of milk, carrying out qualitative analysis on each lipid component, and carrying out integral processing on each lipid component; 4) carrying out orthogonal partial least square variance discrimination analysis on an integral result, and determining a characterization factor capable of completely classifying the two types of milk; 5) establishing an orthogonal partial least square variance discrimination model by