红花羊蹄甲花色素的提取及其稳定性研究

Study on extraction and stability of the pigment from Bauhinia blakeana Dunn flower

摘要: 研究了超声波辅助提取羊蹄甲花红色素的最佳工艺条件,实验结果表明,最佳的提取条件为,液料比1∶80,超声功率120W,盐酸浓度0.3mol/L,提取时间40min。色素的稳定性研究表明:色素在酸性、低温条件下稳定,耐光性好,K+、Na+、Ca2+、葡萄糖、蔗糖、柠檬酸、苯甲酸钠存在利于色素稳定,Zn2+、Cu2+、Mg2+、Al3+、Fe3+、H2O2、Na2SO3影响色素稳定性。

Abstract: The optimal condition for extracting pigment from Bauhinia blakeana Dunn flower was studied through ultrasonic-assisted extraction technology in this paper. Results showed that the optimal processing parameters of ultrasonic-assisted extraction were as follows : solid-liquid ratio 1 ∶80 ( g/mL) , ultrasonic power 120W, hydrochloric acid concentration 0.3mol/L, extraction time 40min. The study on the stability of pigment showed that the pigment was stable under these conditions of acidity and low temperature, and the pigment had a good light fastness. The K+, Na+, Ca2+, glucose, fructose, citric acid, and sodium benzoate could contribute to the stability of the pigment while the Zn2 +, Cu2 +, Mg2 +, Al3 +, Fe3 +, H2O2, Na2SO3had negative effect on the pigment stability.