About: http://webisa.webdatacommons.org/275147280

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	Although concentrations may be more quickly determined in this manner by extrapolation, many variables such as temperature and agitation of the sample must be precisely controlled.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com