About: http://webisa.webdatacommons.org/122807236

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	By selection of bicarbonate concentration and suitable calibration gases, liquid calibration fluids can be prepared having given pH concentrations and partial pressures of carbon dioxide and, optionally, of oxygen or other gases.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca