Mohamed Bouri obtained his Bachelor’s Degree in Biotechnology from Faculty of Science and Technology, Fes-Morocco since 2004, Master’s Degree in Sustainable Chemistry from University of Castilla-La Mancha (2011), Ciudad Real-Spain, and Doctoral thesis in the same University at 2014.His Doctoral Thesis research focused on the development of new analytical methodologies incorporating nanotechnology in (bio)chemical processes measurement.
A simple and rapid methodology to separate and characterize gold nanoparticles (AuNPs) in aqueous... more A simple and rapid methodology to separate and characterize gold nanoparticles (AuNPs) in aqueous medium by capillary electrophoresis–evaporative light scattering detection (CE–ELSD) is presented.
An improved and efficient method for the determination of underivatized amino acids (AAs) based o... more An improved and efficient method for the determination of underivatized amino acids (AAs) based on the use of CE coupled to evaporative light scattering detector (ELSD), involving carbon nanotubes (CNT), was successfully developed. Carboxyled single-walled carbon nanotubes (cSWNTs) were used for the first time to perform the clean-up of the analyzed samples, which were afterwards analyzed by CE-ELSD. White tea samples were used to demonstrate the usefulness of the CE-ELSD coupled methodology. A suitable interface, based on a triple tube design sprayer, was developed and successfully used for coupling both instruments. Parameters affecting the separation and determination, including the elimination of interferences, were studied and properly optimized. Under the optimized conditions good resolution was achieved for the separation of seven AAs. The precision of the method, expressed as relative standard deviation, was found within the 3.5–5.3% range. The LOD obtained for the proposed method were in the 1.2–2.1 pg range and the LOQ, were in the 2.0–11.5 pg range, with injection pressure of 5 KPa for 20 s (15.3 nL). This method is simple, rapid, and selective compared with other conventional techniques.This article is protected by copyright. All rights reserved
A magnetic material based on N-methylimidazolium ionic liquid and Fe3O4 magnetic nanoparticles in... more A magnetic material based on N-methylimidazolium ionic liquid and Fe3O4 magnetic nanoparticles incorporated in a silica matrix has been used to extract and preconcentrate sulfonylurea herbicides, such as thifensulfuron methyl (TSM), metsulfuron methyl (MSM), triasulfuron (TS), tribenuron methyl (TBM) and primisulfuron methyl (PSM) from polluted water samples, prior to their analysis by capillary liquid chromatography with a diode array detector (DAD). Under the optimum conditions, this method allows the determination of TSM, MSM, TS, TBM and PSM in a linear range between 5 and 100 ng mL−1, with relative standard deviation values lower than 5.3 % (n = 10), in all cases. Detection limits ranging between 1.13 and 2.95 ng mL−1 were achieved. The usefulness of the proposed method was demonstrated by the analysis of river water samples, obtaining recoveries higher than 91 %. Figure
Dissipation of bifenthrin and λ-cyhalothrin pyrethroid insecticides, under environmental conditio... more Dissipation of bifenthrin and λ-cyhalothrin pyrethroid insecticides, under environmental conditions, was evaluated on green beans grown in experimental greenhouses (Souss Massa valley, Morocco). Pesticide residues were determined by gas chromatography with micro electron-capture detector (GC-μECD) after dichloromethane extraction and cleanup on florisil phase cartridges. In the case of field experiments, a random block scheme was employed. Each block contained 25 plants in a single row and tests were carried out in triplicates applying pesticides at the recommended doses by the manufacturers. Fruit samples were periodically taken until the end of the preharvest interval (p.i.). The results obtained showed that the p.i of bifenthrin in green bean were 4 days in the winter and 3.5 days in the spring, whereas that for λ-cyhalothrin 8 days was found in the winter and 7.5 days in the spring. Consequently, it is possible to consider the European Union maximum residue limit (EU MRL) values compatible with the proper agricultural practices used for growing green bean in the plastic greenhouse of Souss Massa valley in South Morocco. Bifenthrin had a degradation of first-order kinetics, whereas that of levels for λ-cyhalothrin residue can not be interpreted by the use of a first order model.
Argan hulls extract (AHE) was tested as corrosion inhibitor for mild steel in 1 M HCl. Weight los... more Argan hulls extract (AHE) was tested as corrosion inhibitor for mild steel in 1 M HCl. Weight loss measurements, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS) revealed that inhibiting action increased with increasing concentration of the inhibitor. The highest efficiency 97.3% was obtained at 5 g/L AHE. There was good agreement between gravimetric and electrochemical methods (potentiodynamic polarization and EIS). Results obtained from EIS measurements were analyzed to model the corrosion-inhibition process by use of the appropriate equivalent circuit model; a constant phase element was used. Polarization measurements show also that AHE acts as good mixed inhibitor. AHE is adsorbed on the steel surface in accordance with a Langmuir isotherm adsorption model.
A simple and rapid methodology to separate and characterize gold nanoparticles (AuNPs) in aqueous... more A simple and rapid methodology to separate and characterize gold nanoparticles (AuNPs) in aqueous medium by capillary electrophoresis–evaporative light scattering detection (CE–ELSD) is presented.
An improved and efficient method for the determination of underivatized amino acids (AAs) based o... more An improved and efficient method for the determination of underivatized amino acids (AAs) based on the use of CE coupled to evaporative light scattering detector (ELSD), involving carbon nanotubes (CNT), was successfully developed. Carboxyled single-walled carbon nanotubes (cSWNTs) were used for the first time to perform the clean-up of the analyzed samples, which were afterwards analyzed by CE-ELSD. White tea samples were used to demonstrate the usefulness of the CE-ELSD coupled methodology. A suitable interface, based on a triple tube design sprayer, was developed and successfully used for coupling both instruments. Parameters affecting the separation and determination, including the elimination of interferences, were studied and properly optimized. Under the optimized conditions good resolution was achieved for the separation of seven AAs. The precision of the method, expressed as relative standard deviation, was found within the 3.5–5.3% range. The LOD obtained for the proposed method were in the 1.2–2.1 pg range and the LOQ, were in the 2.0–11.5 pg range, with injection pressure of 5 KPa for 20 s (15.3 nL). This method is simple, rapid, and selective compared with other conventional techniques.This article is protected by copyright. All rights reserved
A magnetic material based on N-methylimidazolium ionic liquid and Fe3O4 magnetic nanoparticles in... more A magnetic material based on N-methylimidazolium ionic liquid and Fe3O4 magnetic nanoparticles incorporated in a silica matrix has been used to extract and preconcentrate sulfonylurea herbicides, such as thifensulfuron methyl (TSM), metsulfuron methyl (MSM), triasulfuron (TS), tribenuron methyl (TBM) and primisulfuron methyl (PSM) from polluted water samples, prior to their analysis by capillary liquid chromatography with a diode array detector (DAD). Under the optimum conditions, this method allows the determination of TSM, MSM, TS, TBM and PSM in a linear range between 5 and 100 ng mL−1, with relative standard deviation values lower than 5.3 % (n = 10), in all cases. Detection limits ranging between 1.13 and 2.95 ng mL−1 were achieved. The usefulness of the proposed method was demonstrated by the analysis of river water samples, obtaining recoveries higher than 91 %. Figure
Dissipation of bifenthrin and λ-cyhalothrin pyrethroid insecticides, under environmental conditio... more Dissipation of bifenthrin and λ-cyhalothrin pyrethroid insecticides, under environmental conditions, was evaluated on green beans grown in experimental greenhouses (Souss Massa valley, Morocco). Pesticide residues were determined by gas chromatography with micro electron-capture detector (GC-μECD) after dichloromethane extraction and cleanup on florisil phase cartridges. In the case of field experiments, a random block scheme was employed. Each block contained 25 plants in a single row and tests were carried out in triplicates applying pesticides at the recommended doses by the manufacturers. Fruit samples were periodically taken until the end of the preharvest interval (p.i.). The results obtained showed that the p.i of bifenthrin in green bean were 4 days in the winter and 3.5 days in the spring, whereas that for λ-cyhalothrin 8 days was found in the winter and 7.5 days in the spring. Consequently, it is possible to consider the European Union maximum residue limit (EU MRL) values compatible with the proper agricultural practices used for growing green bean in the plastic greenhouse of Souss Massa valley in South Morocco. Bifenthrin had a degradation of first-order kinetics, whereas that of levels for λ-cyhalothrin residue can not be interpreted by the use of a first order model.
Argan hulls extract (AHE) was tested as corrosion inhibitor for mild steel in 1 M HCl. Weight los... more Argan hulls extract (AHE) was tested as corrosion inhibitor for mild steel in 1 M HCl. Weight loss measurements, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS) revealed that inhibiting action increased with increasing concentration of the inhibitor. The highest efficiency 97.3% was obtained at 5 g/L AHE. There was good agreement between gravimetric and electrochemical methods (potentiodynamic polarization and EIS). Results obtained from EIS measurements were analyzed to model the corrosion-inhibition process by use of the appropriate equivalent circuit model; a constant phase element was used. Polarization measurements show also that AHE acts as good mixed inhibitor. AHE is adsorbed on the steel surface in accordance with a Langmuir isotherm adsorption model.
Uploads
Papers by Mohamed Bouri