Study on the extraction and stability of carotenoid in pomelo peel

It was investigated that different extraction solvent, solid-liquid ratio time and temperature impact on the extraction yield of carotenoid with abandoned pomelo peel as materials, also researched that light, temperature, pH, metal ions, oxidizing agents, reducing agents and common food additives affect on stability. Results showed that the optimum extraction conditions were:extraction solvent was acetone, solid-liquid ratio was 1∶30g/mL, extraction time was 60min, and extraction temperature was 20℃. The carotenoids in the pomelo peel had the highest rate of 305.98mg/kg. The carotenoid with poor stability could be accelerated the degradation in bright light. The higher the temperature, the faster the decomposition, the stability had been damaged by oxidants and little effect on the reductant stability, stabilization under acidic conditions, but unstabilization under alkaline. These metal ions with Cu2+, Fe2+and Fe3+had damaged the decomposition, sour agents could promote the degradation, preservatives and sweeteners had little effect on carotenoid.