About: http://webisa.webdatacommons.org/19466589

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	For the sodium, the concentrations of impurities were not known very accurately, particularly the concentrations of oxygen and hydrogen.
http://www.w3.org/ns/prov#wasQuotedFrom	oecd-nea.org