3. Results and discussion
3.1. Effect of solvent mixtures on yields of coffee conserves
Coffee seeds viz., Arabica parchment (AP) and Robusta
parchment (RP) were procured and used in the present
studies. Preparation of green coffee conserves from the species
Coffea arabica and Coffea robusta by flaking, powdering
and extraction with solvent mixtures of isopropanol
and water in different ratios and their antioxidant properties
were investigated. The yield of conserves obtained from
arabica and robusta coffee using various solvent mixtures
are shown in Table 1. In arabica coffee, solvent mixture
ratio of 60:40 (isopropanol:water) gave the highest yield
(27%) followed by solvent mixtures of 70:30 (26%) and
80:20 composition (21%).