Assertion: phosphoric acid's impurity | /r/HasProperty | removed by method
Facets:
value: from this phase
type: TEMPORAL
Source sentences:
text: The impurities which have been extracted into the extractant phase can, in general, be removed from this phase by methods which include back-extracting with water or any suitable aqueous basic solution when using the free amine as the extractant; and back-extracting with water, a suitable aqueous acidic solution or a suitable basic solution when using the amine salt as the extractant.