Page 47 - phytochemistry I - PharmD Clinical
P. 47
b- Water and steam distillation:
The plant material is supported on a perforated grid screen inserted some
distance above the bottom of the still. prevent direct water contact with
the plant material.
- Saturated wet steam of low pressure rises through the plant material.
The typical features of this method are:
• The steam is always fully saturated, wet and never superheated.
• The plant material is in contact with steam only, and not with boiling
water.
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