连翘花黄色素的提取及其对光热稳定性的研究

研究了连翘花中黄色素的提取方法 ,并对色素溶液在光照及加热等条件下的稳定性进行了初步研究。结果表明 :该黄色素易溶于乙醇、乙醚、乙酸乙酯等有机溶剂。当选用乙醇为溶剂时 ,色素提取的最佳条件为 :在 70℃、用 1g干花加 10 0mL体积分数为 95 %的乙醇的料液比浸提 3次、每次浸提 2h ,可将色素基本提取完全。该色素对强光的稳定性很差 ,而对弱光及热有较好的稳定性。不同波长的光对色素稳定性的影响也不相同。

Study on the Extraction and Stability to Light and Heat of Yellow Forsythia Flower

This paper studied the extraction method of the yellow pigment from Forsythia flower and its stability to light and heat The results showed that the yellow pigment is miscible in organic solvents of ethyl alcohol?ether and ethyl acetate etc When selecting the ethyl alcohol,the optimum conditions of extraction are 70℃, sample∶solvent (1∶100), extracting three times (2?h for each time) This yellow pigment is stable to weak light and heat, however, it is very sensitive to strong light The effects of different wavelengths for pigment stability are not the same