About: http://webisa.webdatacommons.org/119454634

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	However, preparative columns are very expensive, and there is a limit to the number of columns that can be connected due to restrictions on column pressure tolerance.
http://www.w3.org/ns/prov#wasQuotedFrom	mass-spec-capital.com