About: http://webisa.webdatacommons.org/2273422

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	However, any contaminants which are present, such as microorganisms, can usually be removed in a single filtration step immediately before the organic solvents are removed from the combined solution.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com