_胡萝卜素液晶的制备及其稳定性研究(6)

发布时间:2021-06-09

_胡萝卜素液晶的制备及其稳定性研究

16 2009, Vol. 30, No. 11

食品科学※基础研究

通过测定样品溶液中β-胡萝卜素的残存率来考察不同pH值对β-胡萝卜素稳定性的影响,结果见表1。

表1   不同pH值对β-胡萝卜素残存率的影响

Table 1 Effects of pH value onβ-carotene residue rates in liquid

crystal, microemulsion and ethyl butyrate solution残存率(%)液晶中β-胡萝卜素微乳中β-胡萝卜素丁酸乙酯中β-胡萝卜素

               pH

3.6928643

5.6958956

6.4969473

7.6989886

[6][5][3][4][2]

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由表1可以看出,H+溶度越高,β-胡萝卜素的残存率越低。但是在液晶中β-胡萝卜素的残存率受其影响最小。在pH3.6时,残存率为92%,而微乳液中和油溶液中分别为86%和43%。说明用液晶来包封β-胡萝卜素,极大的提高了它的耐酸性。

综合上述影响因素可以看出,光是影响β-胡萝卜素液晶中β-胡萝卜素稳定性的主要因素,β-胡萝卜素最好避光保存。3

结  论

非离子表面活性剂EL-35/丁酸乙酯/水的溶致液晶制备简单, 具有良好的耐热、耐酸等稳定性。 用该载体来包裹β-胡萝卜素,不仅解决了β-胡萝卜素在应用中的溶解性问题,而且明显提高了β-胡萝卜素的稳定性。 因此用其作为食品行业中的β-胡萝卜素载体具有广泛的开发应用前景。

参考文献:

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