蜂蜜搀假的物理鉴别法初探

通过常见物理特性及流变性差异鉴别蜂蜜是否搀假.在室温下按常见方法向蜂蜜中搀入蔗糖、CMC-Na、果胶、淀粉、氯化钙、尿素和水,然后测定其pH、电导率、糖度、粘度、密度及流变性.实验结果表明,纯蜂蜜与搀假蜂蜜都属于非牛顿流体;搀蔗糖蜂蜜用流变性难以鉴别,只能通过加水后粘度变化鉴别;其余搀假蜂蜜可通过其流变性和某些物理性能不同而与纯蜂蜜区分开.

Preliminary Research of Discrimination of Adulterated Honey with Physical Methods

The discrimination between pure honey and adulterated honey were studied by investigating their common physical characteristics and rheological properities.The pH value,conductivity,sugar content,viscosity,density and rheological properties of pure honey and such honey samples adulterated with sucrose,CMC-Na,pectin,starch,calcium chloride,urea and water were measured.The results showed that both the pure honey and the honey adulterated with sucrose were of non-Newtonian fluids.So they could be distinguished by the changes of their viscosity with adding water but not the difference of their rheological properties.Due to the differences in their theological properties and some other physical properties,the other examined adulterated honey could be distinguished from the pure honey.