About: http://webisa.webdatacommons.org/255206734

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	Purity can be evaluated by chromatography, gel electrophoresis, immunoassay, composition analysis, biological assay, and other methods known in the art. [0114] Methods for purification are well-known in the art.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk