Determination of non-extractable triazine residues by enzyme immunoassay: investigation of model compounds and soil fulvic and humic acids
Article Abstract:
Enzyme immunoassay (EIA) technique was utilized in the analysis of atrazine residues in agricultural soils. EIA technique with polyclonal sheep antibodies against atrazine exhibited high sensitivity to triazines that are bound to humic material. Furthermore, the atrazine-recognition by polyclonal sheep antibodies was not altered by the interaction of the protein with arylamino-s-triazines in the soil samples. The EIA technique can be utilized for the laboratory analysis of soil leachates, water samples and humic materials.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
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Evaluation of primary photoproduct quantum yields in fulvic acid
Article Abstract:
The energies and quantum yields for the formation of triplet states in aqueous solutions of Laurentian and Armadale fulvic acids were investigated using time-resolved photoacoustic spectroscopy together with magnetic circular dichroism spectroscopy. The results showed that the Laurentian sample featured yields which ranged from 0.79 to 0.28 for the pH range 2.0 to 9.5. The Armadale sample had a yield ranging from 0.82 to 0.35 for the same pH range.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1993
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Structural characterization of a fulvic acid and a humic acid using solid-state Ramp-CP-MAS 13C nuclear magnetic resonance
Article Abstract:
A new cross polarization magic angle spinning (CP-MAS) nuclear magnetic resonance technique allowed the accurate structural characterization of a fulvic acid and a humic acid. Results revealed that carbohydrate moieties play a significant role in the fulvic acid and contain the major chemical functionality. The spectra and relaxation parameters obtained allowed the development of two models for the fulvic acid and the humic acid.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1998
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