title: Coupled-column liquid chromatography combined with postcolumn photochemical derivatization and fluorescence detection for the determination of herbicides in groundwater.
abstract: This study examines the application of coupled-column LC-photochemically induced fluorimetry-fluorescence detection (LC-LC-PIF-FD), demonstrating its potential for the quantitative and selective detection of six herbicides, including propanil and the phenylureas monuron, monolinuron, chlorotoluron, diuron and neburon in groundwater samples. An AQUASIL C18 50 x 4.6 mm(2) id column coupled to an AQUASIL C18 150 x 4.6 mm(2) id column for analyte clean-up and determination were used, respectively. A simple SPE with Cl8 cartridges was carried out, yielding average recoveries between 80 and 112% (n = 6) with RSDs between 0.5 and 9%. The LODs ranged from 0.0083 to 0.0833 microg/L in the groundwater samples.
authors.affiliation: Department of Analytical Chemistry, University of Almeria, La Cañada de San Urbano, Almería, Spain.
authors.forename: Ahmed R
authors.initials: AR
authors.lastname: Mughari
authors.forename: María Martínez
authors.initials: MM
authors.lastname: Galera
authors.forename: Piedad Parrilla
authors.initials: PP
authors.lastname: Vázquez
authors.forename: Rosario Santiago
authors.initials: RS
authors.lastname: Valverde
mesh_terms: D002853:Chromatography, Liquid / Q000295:instrumentation / Q000379:methods*; D017022:Flow Injection Analysis; D006540:Herbicides / Q000032:analysis* / Q000737:chemistry*; D010671:Phenylurea Compounds / Q000032:analysis / Q000737:chemistry; D010777:Photochemistry; D013050:Spectrometry, Fluorescence / Q000295:instrumentation / Q000379:methods*; D013997:Time Factors; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry*
chemical_list: D006540:Herbicides; D010671:Phenylurea Compounds; D014874:Water Pollutants, Chemical; D014867:Water