| Use of the cross-section technique linked with multivariate calibration methods to resolve complex pesticide mixtures. | |
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MedLine Citation:
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PMID: 10617427 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The potential of the cross-section (CS) approach in combination with the partial least squares (PLS) and principal component regression (PCR) was assessed in the resolution of a complex pesticide mixture showing twelve overlapped components in High Performance Liquid Chromatography with Diode Array Detection (HPLC-DAD). Careful selection of the CS through the three-dimensional (3D) (A, lambda, t) data matrix gave two-dimensional (2D) signals with the best sensitivity for the determination of each pesticide. In all cases, the application of the PLS method demonstrated a better quantitative prediction ability than that of the PCR method. The CS-PLS approach is a powerful analytical tool. Ten pesticides were well-resolved, while for the other two pesticides of the mixture prediction ability was poor, and they could not be determined, probably due to their low net analytical signal. The CS-PLS model was evaluated by predicting the concentrations of independent test set samples. Finally, the proposed model was successfully applied for the determination of these pesticides in groundwater. |
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Authors:
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A G Frenich; J Martínez Vidal; M Martínez Galera |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Analytical chemistry Volume: 71 ISSN: 0003-2700 ISO Abbreviation: Anal. Chem. Publication Date: 1999 Nov |
Date Detail:
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Created Date: 1999-12-27 Completed Date: 1999-12-27 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0370536 Medline TA: Anal Chem Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 4844-50 Citation Subset: IM |
Affiliation:
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Department of Hydrogeology and Analytical Chemistry, University of Almeria, Spain. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Calibration Chromatography, High Pressure Liquid Least-Squares Analysis Mathematical Computing Multivariate Analysis Pesticides / analysis* Polymerase Chain Reaction Sensitivity and Specificity Software Water Pollutants, Chemical / analysis* Water Supply / analysis |
| Chemical | |
Reg. No./Substance:
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0/Pesticides; 0/Water Pollutants, Chemical |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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