Odlijemo plast kloroforma in postopek dvakrat ponovimo, vsakič z 20 ml. Nazadnje kloroform prefiltriramo skozi suh filtrirni papir, dobro stresamo filtrat pet minut s 5 g brezvodnega natrijevega sulfata v prahu, pustimo mešanico dve uri, da se usede, nato dekantiramo ali prefiltriramo čisti kloroform.
Draw off the chloroform layer and repeat the operation twice using 20 ml each time. Finally, filter the chloroform through dry filter paper, shake the filtrate well for five minutes with 5 g of powdered anhydrous sodium sulphate, leave the mixture to settle for two hours, then decant or filter the clear chloroform.