<http://webisa.webdatacommons.org/prov/109843033>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/97772963> .
<http://webisa.webdatacommons.org/97772963>	<http://www.w3.org/ns/prov#value>	"After the samples have been spiked at the desired level, they are mixed and homogenised in an organic solvent, such as acetonitrile, and then sonicated and centrifuged." .
<http://webisa.webdatacommons.org/97772963>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/97772963>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<hindawi.com> .