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http://hdl.handle.net/10261/20176
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Campo DC | Valor | Lengua/Idioma |
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dc.contributor.author | Nichkova, Mikaela | - |
dc.contributor.author | Feng, Jun | - |
dc.contributor.author | Sánchez Baeza, Francisco J. | - |
dc.contributor.author | Marco, María Pilar | - |
dc.contributor.author | Hammock, Bruce D. | - |
dc.contributor.author | Kennedy, Ian M. | - |
dc.date.accessioned | 2010-01-19T12:29:50Z | - |
dc.date.available | 2010-01-19T12:29:50Z | - |
dc.date.issued | 2003-01-01 | - |
dc.identifier.citation | Analytical Chemistry - Columbus 75(1): 83-90 (2003) | en_US |
dc.identifier.issn | 0003-2700 | - |
dc.identifier.uri | http://hdl.handle.net/10261/20176 | - |
dc.description | 8 pages, 7 figures, 1 table.-- PMID: 12530822 [PubMed].-- Available online Nov 2, 2002. | en_US |
dc.description.abstract | An improved biomonitoring system for the analysis of 2,4,6-trichlorophenol (TCP) in urine samples has been developed. The principle of the biosensor device is the detection of laser-induced fluorescence (LIF) in single microdroplets by a homogeneous quenching fluorescence immunoassay (QFIA). The competitive immunoassay occurs in microdroplets (d = 58,4 μm) produced by a piezoelectric generator system with 10-μm-diameter orifice. A continuous Ar ion laser (488 nm) excites the fluorescent tracer; its fluorescence is detected by a spectrometer attached to a 512 × 512 cooled, charge-coupled device camera. Fluorescence is quenched by specific binding of TCP polyclonal antibodies to the fluorescent tracer (hapten A−fluorescein); the quenching effect is diminished by the presence of the analyte. Thus, an increase in the signal is produced in a positive dose-dependent manner when TCP is present in the sample. In 10 mM PBS buffer, the IC50 of the LIF-microdroplet QFIA is 0.45 μg L-1 reaching a LOD of 0.04 μg L-1. The QFIA with the same reagents performed in microtiter plate format achieved a LOD of 0.36 μg L-1 in buffer solution. Performance in human urine was similar to that observed in the buffer. A LOD of 1.6 μg L-1, with a dynamic range between 4 and 149.5 μg L-1 in urine, was obtained without any sample treatment other than dilution with the assay buffer. The detectability achieved is sufficient for occupational exposure risk assessment. | en_US |
dc.description.sponsorship | This research was supported by the Superfund Basic Research Program from the National Institute of Environmental Health Sciences (Grant 5P42ES04699, NIH with funding provided by EPA), by the EC Program (Contract QLRT-2000-01670), and by the Spanish Government through CICYT (BIO2000-0351-P4-05). UCD is a NIEHS Environmental Health Center P30 ESO5707. | en_US |
dc.format.extent | 22195 bytes | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | en_US |
dc.publisher | American Chemical Society | en_US |
dc.rights | closedAccess | en_US |
dc.subject | Quenching Fluorescence Immunoassay (QFIA) | en_US |
dc.subject | Fluorescent detection methods | en_US |
dc.subject | 2,4,6-trichlorophenol (TCP) | en_US |
dc.subject | Bioanalytical applications | en_US |
dc.subject | PCDFs | en_US |
dc.title | Competitive quenching fluorescence immunoassay for chlorophenols based on laser-induced fluorescence detection in microdroplets | en_US |
dc.type | artículo | en_US |
dc.identifier.doi | 10.1021/ac025933n | - |
dc.description.peerreviewed | Peer reviewed | en_US |
dc.relation.publisherversion | http://dx.doi.org/10.1021/ac025933n | en_US |
dc.identifier.e-issn | 1520-6882 | - |
dc.type.coar | http://purl.org/coar/resource_type/c_6501 | es_ES |
item.openairetype | artículo | - |
item.grantfulltext | none | - |
item.cerifentitytype | Publications | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | No Fulltext | - |
item.languageiso639-1 | en | - |
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