Interaction mechanism of collagen peptides with four phenolic compounds in the ethanol-water solution

Abstract This study demonstrated the interaction mechanism of collagen peptides (CPs) with 4-ethylphenol (4-EP), phenol, guaiacol, and 4-ethylguaiacol (4-EG) in ethanol-water solution. The ultraviolet visible spectroscopy, zeta potential tests hydrogen nuclear magnetic spectroscopy manifested that CPs interacted phenolic compounds. Meanwhile, Isothermal titration calorimetry determination indicated was bonded 4-EP 52 %( v/v ) solution, while hydrophobic forces played a major role guaiacol 4-EG, respectively. Moreover, bonds were involved between phenol. Finally, Head Space-solid Phase Microextraction Gas Chromatography Mass Spectrometry analysis content compounds model solution efficiently decreased presence CPs. In real liquor, it found volatile (including compounds) obviously after added.