The color parameters(L, a, b,ΔE), lycopene content and β-carotene content of papaya pulp were determined, to study the color change of papaya pulp by liquid-immersed quick-freezing during frozen storage. The result showed:During storage, The color stability of papaya pulp by liquid-immersed quick-freezing was better than that by air convection freezing. The degradation of lycopene was the major cause of color change. Compared with the air convection freezing, liquid-immersed quick-freezing can improve the lycopene degradation activation energy by nearly 2 times, better for inhibiting the degradation to maintain stable color.

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