During 2004 year we had investigated and collected 7 Acacia pennata (L.) Willd. samples & 1 sample of Acacia vietnamensis I. Nielsen in some provinces of North Vietnam (Son La. Ha Giang, Lao Cai). The results of saponin quantity definition in these samples have shown that: The total saponin content of in stem skin of Acacia pennata in different areas of Son La province is rather high and varies from 2.16 to 3.18%. The total saponin content of in stem skin of Acacia vietnamensis is low (0.49%). It is the first time Acacia vietnamensis met in the north of Vietnam (Moc Chau- Son La). We used 3 different methods to extract saponin from stem skin of Acacia pennata collected in Na Bai, Chieng Yen, Moc Chau- Son La. The third method is the best because this method gives the highest yield (21.7%), the highest saponin content (11.52%), the extraction product having full saponin composition and the least mixture. This product is porous dry powder and can be used for commodity. High saponin content and least mixture in the product increase more prospects in using it to kill unwanted fish in shrimp aquaculture ponds and decrease environment pollution.
Nguyen Thi Phuong Thao, Bui Van Thanh
Institute of Ecology and Biological Resources, VAST
Nguyen Kim Bich
Institute of medicinal materials
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