Solution | Procedure for production |
---|---|
HCE | â–º 4.7 g of roasted coffee was allowed to completely dissolve in 150 mL of deionized water for 1 h; the solution was filtered using fine mesh mosquito netting |
UHCE | â–º 4.7 g of used roasted coffee was allowed to completely dissolve in 75 mL of deionized water for 1 h; the solution was filtered using fine mesh mosquito netting |
MCE | â–º 2.35 g of roasted coffee was allowed to completely dissolve in 150 mL of deionized water for 1 h; the solution was filtered using fine mesh mosquito netting |
LCE | â–º 1.35 g of roasted coffee was allowed to completely dissolve in 150 mL of deionized water for 1 h; the solution was filtered using fine mesh mosquito netting |
WAa, WAb, or WAc | â–º 100 mL of cool boiled water |