The experiments were carried out in
triplicates. Accordingly 48 experiments (24 3) were carried out as
per the full factorial design. The table of experimental runs is not
provided here to maintain brevity. Temperature above 100 C
(boiling point of solvent) was not considered for the study. The
range of solvent-to-feed ratio was fixed between 5 and 40 mL/g
as this range was optimum for the preparation of extracts used
in the preparation of Lauha bhasma [18].