About: http://webisa.webdatacommons.org/425475213

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	Etching of the glass adsorbent with hydrofluoric acid or other suitable etchant improves the results due to an increase in adsorbent surface area and therefore available surface hydroxyl groups.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com