Using near-infrared spectroscopy, high-performance liquid chromatography, and polymerase chain reaction combined with chemical determination methodsMethod or mass spectrometry can qualitatively and quantitatively detect soy protein in milk, but the detection cost is relatively high.

Lamborghini Tianjin Application Research and Development Center in the United StatesUsing an amino acid analyzer, the difference in amino acid composition between cow's milk and soy protein is utilized to qualitatively and quantitatively detect soy protein added to cow's milk, which compensates for the shortcomings of existing methods that are time-consuming and insensitive to detection.