Dynamics of mineral composition of propolis at its industrial processing

The aim this study was analysis of mineral content of propolis with different botanical origin and this dynamics by industrial processing. In laboratory experiment was the scheme of industrial processing of propolis is reproduced. The samples of propolis from temperate zone collected from a poplar trees (Populus L.), propolis extracts and this waste were evaluated. Mineral composition was using optical emission spectroscopy with inductively coupled plasma (ICP OES) determined. The influence of botanical origin of propolis was established. Propolis from Populus nigra L. differed in higher mineral content, than propolis from a Populus tremula L. As the extracting substances were used the water distilled, 1 M solution of nitrate of ammonium and ethanol (30, 70 and 96%). It is revealed that the mineral composition of different fraction: water-soluble, salt-soluble, ethanolic-soluble of propolis extracts depends from type of extraction. It was showed that mineral content of propolis extract can be change using different extraction methods. The way of cleaning of raw materials of propolis of toxic elements lead and cadmium is offered based on ion-exchange processes with extraction using the ammonium nitrate solution. The received results can be used for optimization of industrial processing of propolis.