Simple and fast methods based on solid-phase extraction coupled to liquid chromatography with UV detection for the monitoring of caffeine in natural and waste waters as marker of anthropogenic impact
dc.contributor.author
dc.date.accessioned
2013-10-07T09:30:11Z
dc.date.available
2013-10-07T09:30:11Z
dc.date.issued
2012
dc.identifier.issn
2090-8636
dc.identifier.uri
dc.description.abstract
Two concentration methods for fast and routine determination of caffeine (using HPLC-UV detection) in surface, and wastewater are evaluated. Both methods are based on solid-phase extraction (SPE) concentration with octadecyl silica sorbents. A common “offline” SPE procedure shows that quantitative recovery of caffeine is obtained with 2 mL of an elution mixture solvent methanol-water containing at least 60% methanol. The method detection limit is 0.1 μg L−1 when percolating 1 L samples through the cartridge. The development of an “online” SPE method based on a mini-SPE column, containing 100 mg of the same sorbent, directly connected to the HPLC system allows the method detection limit to be decreased to 10 ng L−1 with a sample volume of 100 mL. The “offline” SPE method is applied to the analysis of caffeine in wastewater samples, whereas the “on-line” method is used for analysis in natural waters from streams receiving significant water intakes from local wastewater treatment plants
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Hindawi Publishing Corporation
dc.relation.isformatof
Reproducció digital del document publicat a: http://dx.doi.org/10.5402/2012/487138
dc.relation.ispartof
ISRN Chromatography, 2012, vol. 2012, núm. ID 487138
dc.relation.ispartofseries
Articles publicats (D-Q)
dc.rights
Attribution 3.0 Spain
dc.rights.uri
dc.subject
dc.title
Simple and fast methods based on solid-phase extraction coupled to liquid chromatography with UV detection for the monitoring of caffeine in natural and waste waters as marker of anthropogenic impact
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/openAccess
dc.embargo.terms
Cap
dc.type.version
info:eu-repo/semantics/publishedVersion
dc.identifier.doi
dc.identifier.idgrec
017418