3. Results and discussion
3.1. Yield of pectin
The yield of pectin from 1st and 2nd extractions is shown in
Fig. 1. Mango peel subjected to microwave extraction for a period of
10e25 min showed increase in yield of pectin during 1st extraction.
The yield of pectin ranged from 1.7 to 9.9 g/100 g at different microwave energy levels during 1st extraction. It increased with increase of microwave energy and highest yield of pectin was
observed at 600 W. Further increase in yield of pectin was not
observed at 1000 W. Yield of pectin during 2nd extraction ranged
from 1.5 g/100 g to 6.5 g/100 g at different microwave energy levels.
Yield of pectin was three times more at 600 W microwave energy
and 1000 W. Among the time periods studied the yield of pectin
increased with increase in time of extraction up to 20 min and
showed very little increase thereafter