Evaluation of the Binding Mechanism of Anilazine and its Metabolites in Soil Organic Matter

Haider, K.; Spiteller, Michael; Wais, Andreas; Fild, M.

doi:10.1080/03067319308044441

Cited by 59 publications

(63 citation statements)

References 7 publications

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“…Lignin is an important plant polymer for the incorporation of xenobiotic compounds; as discussed before, this also holds for cyprodinil. In contrast to humic substances however [25,28,33,34], lignin shows a high content of intramolecular covalent linkages [29][30][31] which cannot be cleaved by silylation [19,32]. Therefore, it is very likely that there were non-extractable residues present which were not liberated from the plant matrix by this extraction method.…”

Section: Chromatographic Characterization Of the Bound Residues Mobilmentioning

confidence: 95%

Application of [U-¹⁴C-phenyl]-cyprodinil on spring wheat to investigate the formation and structure of non-extractable residues within the cell wall

Ertunç

Schmidt

Maier

et al. 2003

Toxicological & Environmental Chemistry

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Section: Chromatographic Characterization Of the Bound Residues Mobilmentioning

confidence: 95%

Application of [U-¹⁴C-phenyl]-cyprodinil on spring wheat to investigate the formation and structure of non-extractable residues within the cell wall

Ertunç

Schmidt

Maier

et al. 2003

Toxicological & Environmental Chemistry

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“…In addition to incorporation of highly available substrates, labeling has also been used to study the fate of xenobiotics -organic pollutants and pesticides. This has mostly been done by solution 13 C NMR, including incubation with organic matter prepared from 13 C-depleted precursors followed by silylation to increase solubility and visibility of the 13 C-labeled substrate (Haider et al 1992(Haider et al , 1993Hatcher et al 1993;Wais et al 1995Wais et al , 1996Dec and Bollag 1997;Dec et al 1997aDec et al , 1997b. There have also been a few studies using solid-state 13 C NMR to detect the bound substrate (Jurkiewicz and Maciel 1995b;Weissmahr et al 1997;Witte et al 1998;Guthrie et al 1999;Benoit and Preston 2000).…”

Section: C-13 Labeling and Xenobioticsmentioning

confidence: 99%

Carbon-13 solid-state NMR of soil organic matter - using the technique effectively

Preston¹

2001

Can. J. Soil. Sci.

112

104

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).Preston, C. M. 2001. Carbon-13 solid-state NMR of soil organic matter -using the technique effectively. Can. J. Soil Sci. 81: 255-270. Solid-state 13 C CPMAS NMR offers many options for characterizing carbon in soil organic matter (SOM). Its effectiveness, however, is often limited by a poor understanding of the techniques, and lack of hands-on access and training opportunities for students. Of nearly 250 modern NMR systems in Canada, approximately one is genuinely available for SOM studies, and there is poor communication between NMR operators and SOM users. While quantitative reliability can be addressed to some extent by multiple contact-time experiments or single-pulse (Bloch decay) spectra, it is also important to consider the effects of spectrometer background, spinning sidebands (especially with higher magnetic fields) and processing operations such as linebroadening, phasing and baseline correction. In many studies, more consideration needs to be given to instrument specifications, the type of information needed, and whether sample fractionation or pretreatment should be used. Structural information can be greatly enhanced by dipolar-dephasing and sideband suppression sequences. Sequences based on relaxation differences can reveal pools of carbon with different structures. Data analysis can be enhanced by principal component analysis, spectrum deconvolution and difference spectra. Studies of xenobiotics and C metabolism can be greatly aided by 13 C-labeling. However, a key limitation to SOM applications remains the gap in culture and expectations of the users.Key words: Soil organic matter, 13 C CPMAS NMR, Bloch decay, dipolar dephasing, spinning sidebands Preston, C. M. 2001. Analyse de la matière organique du sol par RMN au 13 C électronique -de l'importance de bien utiliser la technique. Can. J. Soil Sci. 81: 255-270. La RMN CPMAS 13 C électronique permet de caractériser le carbone présent dans la matière organique du sol (MOS) de diverses manières. Il arrive souvent cependant que cette technique perde de son efficacité parce qu'on la connaît mal et parce que les étudiants n'ont pas eu la chance de l'examiner ou de l'expérimenter. Sur les 250 systèmes modernes de RMN existant au Canada, un seul, à peu près, est vraiment réservé à l'étude de la MOS; de plus, la communication passe mal entre les opérateurs de systèmes RMN et les utilisateurs de MOS. Bien qu'on puisse remédier dans une certaine mesure au problème de la fiabilité quantitative en multipliant les expériences sur la durée de contact ou en recourant au spectre obtenu après une seule impulsion (décroissance de Bloch), il ne faut pas négliger les effets de l'arrière-plan du spectromètre, de la rotation des bandes latérales (surtout quand le champ magnétique est puissant) et des opérations de traitement comme l'élargissement des lignes, la mise en phase et la correction de la ligne de base. Dans de nombreux cas, on devrait accorder plus d'attention aux paramètres de l'instrument, au genre de données requises et à la nécessité de fractionner et...

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“…Reduced mobility and biocidal activity due to bonding to humic substances are often described (5)(6)(7)(8). It is in some cases supported by various experimental results, that parent molecules or metabolites are bound to the humic matrix either by covalent bonding (9)(10)(11)(12)(13)(14)(15)(16)51), ionic bonding (17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28), charge transfer complexes (29)(30)(31)(32)(33), ligand exchange (34,35), hydrogen bonding (23,31,(36)(37)(38)(39)(40), van der Waals forces (22,(41)(42)(43)(44), hydrophobic sorption (45)(46)(47)(48)(49)…”

Section: Comission On Pesticide Chemistrymentioning

confidence: 91%

Soil-Bound Residues

Burauel

Wais

Führ

1998

ACS Symposium Series

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Evaluation of the Binding Mechanism of Anilazine and its Metabolites in Soil Organic Matter

Cited by 59 publications

References 7 publications

Application of [U-¹⁴C-phenyl]-cyprodinil on spring wheat to investigate the formation and structure of non-extractable residues within the cell wall

Application of [U-¹⁴C-phenyl]-cyprodinil on spring wheat to investigate the formation and structure of non-extractable residues within the cell wall

Carbon-13 solid-state NMR of soil organic matter - using the technique effectively

Soil-Bound Residues

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Evaluation of the Binding Mechanism of Anilazine and its Metabolites in Soil Organic Matter

Cited by 59 publications

References 7 publications

Application of [U-14C-phenyl]-cyprodinil on spring wheat to investigate the formation and structure of non-extractable residues within the cell wall

Application of [U-14C-phenyl]-cyprodinil on spring wheat to investigate the formation and structure of non-extractable residues within the cell wall

Carbon-13 solid-state NMR of soil organic matter - using the technique effectively

Soil-Bound Residues

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Product

Resources

About

Application of [U-¹⁴C-phenyl]-cyprodinil on spring wheat to investigate the formation and structure of non-extractable residues within the cell wall

Application of [U-¹⁴C-phenyl]-cyprodinil on spring wheat to investigate the formation and structure of non-extractable residues within the cell wall