Multiresidue analysis of S-triazine herbicides in environmental water by micellar electrokinetic capillary chromatography

Citation
M. Chicharro et al., Multiresidue analysis of S-triazine herbicides in environmental water by micellar electrokinetic capillary chromatography, J LIQ CHR R, 24(4), 2001, pp. 461-478
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Chemistry & Analysis","Spectroscopy /Instrumentation/Analytical Sciences
Journal title
JOURNAL OF LIQUID CHROMATOGRAPHY & RELATED TECHNOLOGIES
ISSN journal
1082-6076 → ACNP
Volume
24
Issue
4
Year of publication
2001
Pages
461 - 478
Database
ISI
SICI code
1082-6076(2001)24:4<461:MAOSHI>2.0.ZU;2-S
Abstract
A micellar electrokinetic capillary chromatography (MEKC) method employing sodium dodecil sulfate (SDS) as the surfactant has been developed to separa te and to quantificate simazine, aziprotryne, hexazinone, and diuron in env ironmental water samples. Good linearity was obtained between normalized peak area and standard solut ion concentration for all studied compounds (concentration range: 0.1 to 5. 0 mug/mL). The detection limit was lower than 6 pg (loaded into the capilla ry a 35 muL of sample volume) for all herbicides. The optimized MEKC method after a 1000-fold concentration step by solid-pha se extraction (SPE) was applied to determine these herbicides in environmen tal water samples. Herbicide concentrations lower than 0.1 ng/mL can be mea sured, and can have a relative standard deviation of about 4.0%. Simazine w as detected at concentrations around 1.0 to 2.0 ng/mL in the Alberche and T ajuna river waters. The highest concentration appeared in the Tajuna river. The presence of simazine in both river waters was contrasted with gas chro matography coupled to mass spectrometry analysis. The quantification of the samples was contrasted with immunochemical assays, obtaining good correlat ion between this and MEKC results.