Preliminary Study on Extraction Conditions of Pigment from Orange Peel

[Objective] The study was to determine the optimum extraction condition of pigment from orange peel.[Method] With the peel of Wenzhou orange that produced from Yuechang in Shaoguan city as material,the optimum parameters combination of extraction in extraction technology of pigment from orange peel were determined through single factor test and orthogonal test.[Result] In the temperature range of 35-65 ℃,the absorbance value of water extract was increased with the rise of the extraction temperature.The absorbance value was increased with the prolonging of extraction times in 0.5-1.5 h.The extraction effect was best when the liquid-solid ratio was 20∶ 1(ml/g).The absorbance value increased with the rise of the alcohol concn.and the increase of the extraction times.The effects of every factors on extraction pigment from orange peel from big to small was extraction temperatureextraction timesextraction time.[Conclusion]The optimum extraction conditions of pigment from orange peel were that the extraction temperature was 50 ℃,the alcohol concn.95%,the liquid-solid ratio 20∶ 1(ml/g),the extraction time 1 h and the extraction times twice.