Study on decomposition products of norbixin during bleaching with hydrogen peroxide and a peroxidase by means of UPLC-UV and mass spectrometry

► Under bleaching conditions, unsaturated aldehydes and ketones are formed as decomposition products of norbixin. ► A reaction scheme for the decomposition of norbixin is proposed. ► Decomposition products of norbixin may react with endogeneous compounds in whey.