蜂蜜中羟甲基糠醛的脱除

Removal of hydroxymethylfurfural from honey

将蜂蜜中有害物质去除后再将其应用于食品加工或其他领域,可有效实现资源再利用。采用大孔树脂吸附技术,研究了树脂类型及工艺条件对脱除蜂蜜中5-羟甲基糠醛(5-hydroxymet hylfurfural,5-HMF)的影响,并探究吸附前后蜂蜜理化指标及酚类组成的差异,以及对不同种类蜂蜜的适用性。结果表明,弱极性树脂适合脱除蜂蜜中5-HMF,其中LSI-3型树脂效果最佳;降低温度、增加树脂用量以及延长吸附时间有助于提高5-HMF脱除效果,在25℃、树脂用量44 g/kg(蜂蜜)、80 min优化吸附工艺条件下,LSI-3型树脂对5-HMF脱除率可达62.49%;另外,LSI-3型树脂吸附对蜂蜜电导率、pH和还原糖总量没有显著影响,但淀粉酶值略有降低,酚类成分则明显减少,该方法对脱除不同种类蜂蜜中5-HMF具有良好适用性。该研究为5-HMF含量超标的蜂蜜提供了一种资源再利用的新途径。

The removal of hazardous substances from honey is beneficial for the utilization in food processing or other fields,which will contribute to realize the resource reuse effectively.By virtue of macroporous resin adsorption technology,the effects of resin type and process conditions on the removal of 5-hydroxymethylfurfural(5-HMF)from 5-HMF positive honey sample were investigated,and the physicochemical indexes and phenolic ingredients of honey before and after resin adsorption were analyzed,as well as the macroporous resin applicability to different types of honey.The results showed that weak polar resin was suitable for removing 5-HMF from honey,among which LSI-3 resin had the best removal effect.Reducing temperature,increasing resin content and prolonging adsorption time contributed to 5-HMF removal,and the removal rate reached 62.49%under the optimum adsorption condition of 25℃,44 g/kg resin content and 80 min for LSI-3 resin.In addition,LSI-3 resin adsorption did not significantly affect the conductivity,pH and total reducing sugar content of honey,but the amylase value decreased slightly,and phenolic components decreased obviously,showing a good applicability for removing 5-HMF from different kinds of honey.This provides a new approach for treatment of honey with high 5-HMF content.