Spectrofluorimetric Analysis of the Fungicide Carbendazim and Its Metabolite 2-Aminobenzimidazole in Natural Water

Thiaré, Diène Diégane; Khonté, Abdourakhmane; Diop, Amadou; Mendy, Alphonse; Coly, Atanasse; Delattre, François; Gaye-Seye, Mame Diabou; Tine, Alphonse

doi:10.4236/ajac.2015.69073

Cited by 12 publications

(4 citation statements)

References 17 publications

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“…Plusieurs études ont montré que le pH est un facteur qui affecte fortement le signal de fluorescence des molécules organiques (Thiaré et al, 2014;Thiaré et al, 2015a;Coly et al, 2001;Coly et al, 2009). Pour le naphtopyranone, l'intensité de fluorescence augmente fortement à partir du pH 8 puis le signal devient constant entre 8 et 12.…”

Section: Discussionunclassified

“…En effet, la fluorescence est un puissant outil d'investigation des propriétés et d'analyse tant qualitative que quantitative des molécules organiques (Mbow et al, 2014). Sa précision et sa sensibilité ne sont plus à démontrer (Thiaré et al, 2014;Thiaré et al, 2015a;Coly, 2001;Coly et al, 2001;Coly et al, 2009 Pour étudier la variation de l'intensité de fluorescence en fonction du pH de la solution, des concentrations appropriées de solutions d'acide chlorhydrique ou de soude ont été utilisées pour faire varier le pH. Un échantillon de la solution diluée du naphtopyranone a été placé dans la cuve en quartz et les spectres de fluorescence ont été enregistrés entre 200 et 300 nm pour l'excitation et entre 350 et 500 nm pour l'émission avec une vitesse de balayage de 480 nm/min.…”

Section: Introductionunclassified

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Etude des propriétés fluorescentes d’un naphtopyranone isolé de <i>Guiera senegalensis</i>

Mbow¹,

Thiaré²,

Ndiaye³

et al. 2017

Int. J. Bio. Chem. Sci

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Mots clés : Naphtopyranone, Guiera senegalensis, analyse par fluorescence, lumière UV. Study of the Fluorescent properties of a naphtopyranone isolated fromGuiera senegalensis ABSTRACT Guiera senegalensis is a plant used in therapeutic in Senegal and in several countries of West Africa. This justifies the development of photochemical methods of analysis of the isolated fluorescent naphtopyranone of this plant. Thus, these types of compounds could be analyzed from biological fluids and facilitate the pharmacological study. The influence of pH and several solvents of different polarity on the fluorescence intensity, the excitation and emission of naphtopyranone spectra were studied. This study allowed to draw calibration lines of the naphthopyranone, which leads to a calibration line strongly correlated. All analytical parameters that result were calculated. The results of irradiation were used to determine rate constant (k = 4,85.10 -2 min -1 ), half-life (t 1/2 =14,3 min), and order 1 of the kinetic of photodegradation. The low values of the limit of detection (LOD = 27 μg/mL) and quantification (LOQ = 250 μg/mL) shows a good sensitivity of this method of analysis and its possible application as a technique for qualitative and quantitative detection of these types of compounds in urine or blood.

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Section: Discussionunclassified

Section: Introductionunclassified

Etude des propriétés fluorescentes d’un naphtopyranone isolé de <i>Guiera senegalensis</i>

Mbow¹,

Thiaré²,

Ndiaye³

et al. 2017

Int. J. Bio. Chem. Sci

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“…The results of the chemical analyses carried out within the 48 h period of media renewal showed that the carbendazim concentration decreased over time, with a decay rate (K 0 ) of 0.03 h −1 (st. error = 0.005) (this is also described in Silva et al (2015) [22]), corresponding with a half-life of 23 h. Although carbendazim is degraded in ASTM medium, the presence of different metabolites cannot be disregarded. One already identified major metabolite of carbendazim is 2-aminobenzimidazole [28,29].…”

Section: Chemical Analysesmentioning

confidence: 99%

Daphnia magna Multigeneration Exposure to Carbendazim: Gene Transcription Responses

Silva,

Soares

et al. 2023

Toxics

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The world population is experiencing colossal growth and thus demand for food, leading to an increase in the use of pesticides. Persistent pesticide contamination, such as carbendazim, remains a pressing environmental concern, with potentially long-term impacts on aquatic ecosystems. In the present study, Daphnia magna was exposed to carbendazim (5 µg L−1) for 12 generations, with the aim of assessing gene transcription alterations induced by carbendazim (using a D. magna custom microarray). The results showed that carbendazim caused changes in genes involved in the response to stress, DNA replication/repair, neurotransmission, ATP production, and lipid and carbohydrate metabolism at concentrations already found in the environment. These outcomes support the results of previous studies, in which carbendazim induced genotoxic effects and reproduction impairment (increasing the number of aborted eggs with the decreasing number of neonates produced). The exposure of daphnids to carbendazim did not cause a stable change in gene transcription between generations, with more genes being differentially expressed in the F0 generation than in the F12 generation. This could show some possible daphnid acclimation after 12 generations and is aligned with previous multigenerational studies where few ecotoxicological effects at the individual and populational levels and other subcellular level effects (e.g., biochemical biomarkers) were found.

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“…33,34 The ability to rapidly and accurately detect/determine CBZ in different matrices is a long-time challenge in many analytical laboratories. There is considerable literature regarding determination of CBZ using different techniques such as high-performance liquid chromatography with fluorescence 30,35 and diode array 36 detection, liquid chromatography-mass spectrometry, 37 spectrofluorimetry, 38 and surface-enhanced Raman scattering. 39 On the other hand, some reports are dealing with the electroctrochemical determination of CBZ based on its oxidation.…”

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Tetrabutylammonium Chloride Modified Carbon Paste Electrode for Rapid and Highly Sensitive Voltammetric Determination of Carbendazim

Šekuljica

Kalcher

Anojčić

2020

J. Electrochem. Soc.

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The voltammetric characterization and determination of fungicide carbendazim (methyl-1H-benzimidazol-2-yl-carbamate, CBZ) were performed using simple and highly sensitive electrochemical sensor based on tetrabutylammonium chloride (TBACl) ionic liquid as modifier of carbon paste electrode (CPE) and compared to conventional CPE in aqueous Britton-Robinson buffer solution as supporting electrolyte (pH 2.0-11.98). Cyclic voltammetric (CV) studies suggested that electrode reaction is mixed diffusionadsorption controlled. Also, the square wave voltammetric (SWV) and square-wave adsorptive stripping voltammetric (SW-AdSV) methods were optimized for quantitation of CBZ. In the model solutions of pH 5.0, the linear calibration curves were obtained in CBZ concentration ranges from 2.5 to 280.0 ng ml −1 by SWV and from 1.5 to 40.0 ng ml −1 by SW-AdSV method (E acc = −0.25 V, t acc = 180 s) with relative standard deviation lower than 2.0%. A great improvement in terms of CBZ electrochemical oxidation with low detection limit as 0.45 ng ml −1 was achieved using proposed highly sensitive SW-AdSV method. TBACl-CPE in combination with the optimized SWV and SW-AdSV methods was successfully applied for trace level determination of CBZ in spiked fruit juice and river water samples, respectively, with good recovery and reproducibility, demonstrating the reliability and accuracy of the developed methods.

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Spectrofluorimetric Analysis of the Fungicide Carbendazim and Its Metabolite 2-Aminobenzimidazole in Natural Water

Cited by 12 publications

References 17 publications

Etude des propriétés fluorescentes d’un naphtopyranone isolé de <i>Guiera senegalensis</i>

Etude des propriétés fluorescentes d’un naphtopyranone isolé de <i>Guiera senegalensis</i>

Daphnia magna Multigeneration Exposure to Carbendazim: Gene Transcription Responses

Tetrabutylammonium Chloride Modified Carbon Paste Electrode for Rapid and Highly Sensitive Voltammetric Determination of Carbendazim

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