Dry tobacco leaves (14.7 g) was shredded and then extracted by Soxhlet extractor with 300 ml methanolfor 4 hfirstly.Afterfiltrated with 0.22 m nylon membran
Dry tobacco leaves (14.7 g) was shredded and then extracted bySoxhlet extractor with 300 ml methanolfor 4 hfirstly.Afterfiltratedwith 0.22 m nylon membran