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首页> 外文期刊>Journal of Microencapsulation: Microcapsules Liposomes Nanoparticles Microcells Microspheres >Complexation/encapsulation of green tea polyphenols in mixed calcium carbonate and phosphate micro-particles
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Complexation/encapsulation of green tea polyphenols in mixed calcium carbonate and phosphate micro-particles

机译:碳酸钙和磷酸盐混合微粒中绿茶多酚的络合/包封

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摘要

We used a double-jet mixer to encapsulate water-soluble polyphenols, green tea extract (GTE), with calcium-based inorganic materials. The device mixed calcium chloride solutions with a solution of carbonate and phosphate in the presence of a GTE solution, and formed micro-particles which capture the GTE molecules. The micro-particles were analysed by liquid chromatography coupled to tandem mass spectroscopy to determine the encapsulation yield and loading of the different GTE components.We established correlations between (1) the efficiency of the GTE encapsulation and the composition of the mixed anion solutions and (2) the protonation degree of the ions and the molar ratio of calcium cations and carbonate/phosphate anions. An optimal and reproducible GTE loading of about 40% with an encapsulation yield of 65% was observed for a carbonate/phosphate molar composition of 4:1. In addition, our experimental results showed that the process is selective and favours the encapsulation of gallated species which form stronger complexes with calcium cations.
机译:我们使用双喷射混合器将钙基无机材料封装在水溶性多酚,绿茶提取物(GTE)中。该设备在存在GTE溶液的情况下将氯化钙溶液与碳酸盐和磷酸盐溶液混合,并形成捕获GTE分子的微粒。通过液相色谱-串联质谱法对微粒进行分析,以确定不同GTE组分的包封率和载量。我们建立了(1)GTE包封效率与混合阴离子溶液的组成之间的相关性,以及( 2)离子的质子化程度以及钙阳离子和碳酸根/磷酸根阴离子的摩尔比。对于4∶1的碳酸盐/磷酸盐摩尔组成,观察到最佳和可重现的GTE负载量为约40%,封装产率为65%。此外,我们的实验结果表明,该过程具有选择性,有利于将没食子酸的物种封装在一起,后者与钙阳离子形成更强的配合物。

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