The efficiency of methanol for the extraction of some herbicide residues from soil

Cotterill, E. G.

doi:10.1002/ps.2780110106

Cited by 34 publications

(16 citation statements)

References 13 publications

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“…It was found that the addition of water markedly increased the recovery of chlorpyrifos and acephate. It was reported elsewhere that the presence of water is important for the extraction of simazine [25]. The presence of water helps to disperse the soil, allowing the extractant to work on larger surface areas of the soil particles.…”

Section: Methods Development and Recovery Studiesmentioning

confidence: 98%

Determination of chlorpyrifos and acephate in tropical soils and application in dissipation studies

Chai

Mohd-Tahir

Hansen

2008

International Journal of Environmental Analytical Chemistry

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Section: Methods Development and Recovery Studiesmentioning

confidence: 98%

Determination of chlorpyrifos and acephate in tropical soils and application in dissipation studies

Chai

Mohd-Tahir

Hansen

2008

International Journal of Environmental Analytical Chemistry

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“…The radioactivity in each aliquot was determined by a liquid scintillation counting and corrected for quenching and background. 3. Mention of a trademark or product does not constitute a guarantee or warranty of the product by the U.S. Department of Agriculture, and does not imply its approval to the exclusion of other products that may also be suitable.…”

Section: Methodsmentioning

confidence: 97%

“…In addition, it could cause chemical decomposition or extraction of compounds from soil which may interfere with metribuzin determination. In spite of extensive evaluation of different solvent systems varying in extradant ratios (3,8,9,10,12,19) for extraction efficiencies, the efficiency of methanol as an extractant for some U.S. soils of different chemical and physical properties has not been thoroughly investigated.…”

Section: Introductionmentioning

confidence: 99%

Efficiency of methanol:Water solutions for metribuzin extraction from selected soils

Locke¹,

Pothuluri

Harper

1990

Communications in Soil Science and Plant Analysis

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Extraction efficiency for metribuzin [4-amino-6-(l,l-dimethylethyl)-3-(methylthio)-l,2,4-triazin-5(4H)-one] from soil was evaluated using four solutions of methanol:water at ratios of 1:1, 7:3, 4:1, and 1:0 v/v. Two concentrations of metribuzin (0.216 and 2.44 ug/ g soil, unlabeled and I4 C-metribuzin, respectively) were added to surface and subsurface samples of a Dundee silt loam soil. Although the differences in extraction efficiencies were slight due to differences in methanol:water ratios, the metribuzin recovery varied with soil depth. Less metribuzin was recovered from surface soil extracted with 1:1 and 1:0 methanol:water solutions when compared to 7:3 and 4:1 solutions (80 and 81% vs 89 and 88% recoveries, respectively). About equal quantities, 81 to 85%, were recovered from the subsurface soil. Three extraction shaking times (0.5 h followed by another 0.5 h; 4 h:4 h; and 24 h:24 h) were also evaluated using the 4:1 extractant. No recovery differences were observed between the 0.5 h and 4 h shaking times. However, significantly higher recoveries occurred in both the surface and subsurface soil with 24 h shaking. The efficiency of this method was also determined on Eustis loamy sand, Sharkey clay, and Dorovan muck soils of diverse physical and chemical properties. The 4:1 extracting solution consistently 1.

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“…To determine chemical degradation, chemicals were extracted from 5 g soil with 15 mL methanol (> 99%) twice (Cotterill 1980). The extract was concentrated and filtered through a 0.22-µm syringe filter.…”

Section: Degradation Of 24d and 4cp In Contaminated Soilsmentioning

confidence: 99%

Biodegradation of 2,4-dichlorophenoxyacetic acid and 4-chlorophenol in contaminated soils by <i>Pseudomonas fluorescens</i> strain HH

Duc

Oanh

Hien

2019

V J Bio

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Herbicides with 2,4-dichlorophenoxyacetic acid (2,4D) has been commonly used to control weeds and widely detected in environments. In this study, biodegradating activity of Pseudomonas fluorescens HH on 2,4D and 4-chlorophenol (4CP) in soil was carried out. The inoculation with Pseudomonas fluorescens HH in soils increased the degradation of 4CP and 2,4D by from 47.0% to 51.4% and from 38.4% to 47.4%, respectively, compared to the degradation by autochthonous microorganisms. Pseudomonas fluorescens HH could degrade well 2,4D and 4CP in various soils, but the most efficient chemical removal was observed when they were in the loamy soil. Moreover, the efficiency of chemical degradation was significantly affected by the moisture contents with the highest performance of degradation at 10 and 20% soil moisture. Also, the addition of nitrogen (N), phosphorous (P) and potassium (K) stimulated the dissipation rates. The determination of degradation pathway for 2,4D in Pseudomonas fluorescens HH indicated that 2,4-dichlorophenol (2,4DCP) and 4CP were formed as metabolites.

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The efficiency of methanol for the extraction of some herbicide residues from soil

Cited by 34 publications

References 13 publications

Determination of chlorpyrifos and acephate in tropical soils and application in dissipation studies

Determination of chlorpyrifos and acephate in tropical soils and application in dissipation studies

Efficiency of methanol:Water solutions for metribuzin extraction from selected soils

Biodegradation of 2,4-dichlorophenoxyacetic acid and 4-chlorophenol in contaminated soils by <i>Pseudomonas fluorescens</i> strain HH

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