Extraction of Phenolic Compounds from Raspberry Press Cake

Fig. 5. Sorbtion of the dry extracts obtained with 80 % EtOH at 50 °Cwith hot water pre-extraction5 pav. Sausų ekstraktų, išekstrahuotų 80 % EtOH 50 °C temperatūroje,taikant priešekstrakciją karštu vandeniu, sorbcijaIt is well established that total phenolics content contribute greatly to overallantioxidant activity of the plant-derived extracts. The highest total phenolics content,as expressed per one gram basis of a dry extract with MD, was found in the extractsobtained with 80 % ethanol at 50 °C, where 20 min pre-extraction with hot water wasapplied (Fig. 6). The average total phenolics value of the dry extracts obtained duringall three extraction steps was 90.84 mg g -1 .Fig. 6. Total phenolics content in the extracts6 pav. Bendras fenolinių junginių kiekis ekstraktuose25