saucepan containing about 500 ml
1.5% fresh-squeezed lemon juice
The boiled potatoes
were then peeled to remove the skin, and cut into large
chunks (5–7.5 cm) using a knife.
kept at room temperature
boiled potatoes
acetone-petroleum ether extraction
filtration through a sintered glass filter
under vacuum
vacuum filter
with black cloth
mortar and pestle rinsed
with small amounts of acetone
homogenate became colourless
containing acetone
was discarded
This step was repeated for 3–4 times with 100 ml distilled
water added each time until the residual acetone was
removed
150 ml distilled water