Moreno et al. (2010) obtained higher yields of extraction using dry samples for the extraction of eucalyptus EO by steam distillation; these authors reported a decrease in yield when the moisture content in the eucalyptus leaf increase from 16.1 to 35.9%. However, these results are associated with a process of higher costs due to the previous processing (drying) step needed before extraction.
In our experiments the cost of the process using a trydryer increases, approximately,
10 times the price of using samples with the high moisture content.