50 g of Juice from cactus pears was

50 g of Juice from cactus pears was mix with 80% aqueous
ethanol as solvent for dye extraction. Extraction was performed
by continuous stirring. The solution was separated from the plant
tissue on a Büchner funnel with a filter paper. To achieve complete
discolouration of the plant material, the filter residue was rinsed
with the extraction solution.