Original sentence: Lanthanum can also be separated from solution of rare earth nitrates by liquid-liquid extraction with a suitable organic liquid, such as tributil phosphalate
Edited sentence: Currently, the most widely used extractant for the purification of lanthanum and the other lanthanoids is the 2-ethylhexyl ester of 2-ethylhexylphosphonic acid; this has better handling characteristics than the previously used bis-2-ethylhexyl phosphate.Lanthanum can also be separated from solution of rare earth nitrates by liquid-liquid extraction with a suitable organic liquid, such as tributyl phosphalate