About: http://webisa.webdatacommons.org/416990053

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	difficulty differentiating metals, particularly toxic metals. (Holmes-Farley 2003) Scientists do use ICP scans to study seawater, but the metals are first concentrated using resins or other methods.
http://www.w3.org/ns/prov#wasQuotedFrom	advancedaquarist.com