About: http://webisa.webdatacommons.org/152554482

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	In fact, the concentration of sodium ions (generally speaking, ions of an alkali metal other than lithium) can be made about 1000 ppm or less.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au