Document Detail


Interaction of soil humic acids with herbicide paraquat analyzed by surface-enhanced Raman scattering and fluorescence spectroscopy on silver plasmonic nanoparticles.
MedLine Citation:
PMID:  21704762     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
A study of the interaction between paraquat (methyl viologen) and humic acids, extracted from a soil amended over 30 years with crop residues, cow slurries and cattle manure, was carried out by two emission spectroscopies based on plasmonic effects: surface-enhanced Raman scattering (SERS) and surface-enhanced fluorescence (SEF). To carry out this study Ag nanoparticles were used. The complex formation was tested by analyzing the effect of the herbicide on humic acids, and by varying experimental parameters such as the pH and the laser excitation wavelength. The study of the vibrational bands led to infer information about the interaction mechanism of paraquat with humic acids and to find a correlation between this interaction and the humic acids structural modification induced by the different amendments added to soil.
Authors:
M L Roldán; G Corrado; O Francioso; S Sanchez-Cortes
Publication Detail:
Type:  Journal Article     Date:  2011-05-11
Journal Detail:
Title:  Analytica chimica acta     Volume:  699     ISSN:  1873-4324     ISO Abbreviation:  Anal. Chim. Acta     Publication Date:  2011 Aug 
Date Detail:
Created Date:  2011-06-27     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0370534     Medline TA:  Anal Chim Acta     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  87-95     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 Elsevier B.V. All rights reserved.
Affiliation:
Instituto de Estructura de la Materia, CSIC, Serrano 121, 28006 Madrid, Spain.
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