The optimization of polysaccharide extraction process from Zingiber striolatum in Fanjing mountain by microwave-assisted method

The single factor and the orthogonal test were applied and the result showed that the optimum extraction process conditions were three minutes' microwave digestion time;1∶ 20(g∶ mL) solid-liquid ratio and 264W microwave power.Under those conditions,the extraction rate of Zingiber striolaum polysaccharide was 13.01% and RSD was 0.44%.Compared with ultrasonic method and the conventional extraction method,the microwave assisted method greatly shortened the extraction time,saved the materials and enhanced the extraction rate of Zingiber striolaum polysaccharides.