Laser spectroscopy
Development of laser spectrofluorimetric analysis methods
Analysis of phytosanitary residues:
We develop sensitive and rapid methods for the analysis of pesticide residues in environmental matrices (water, soil, air...) by laser photoinduced fluorescence. Several studies have already been published on this subject, and we are currently working on new evolutions of this method in collaboration with the universities of Dakar and Paris Marne-la-Vallée:
- Development of a new set upusing simultaneously two excitation sources and coupling to liquid chromatography to obtain more sensitivity and specificity
- Use of chemometric techniques for spectrum analysis, in the case of pesticide mixtures for direct analysis, or in the case of incomplete HPLC separation .
- Monitoring the photodegradation kinetics of pesticides in natural waters and identifying formed photoproducts that may be more toxic than the original pesticide.
Trace hydrocarbon analysis:
We are working on the development and improvement of the performance of an online detector (used as an alert station) for traces of hydrocarbons:
- Correction of interference induced by suspended matter on the accuracy of the determination of the hydrocarbon content. Measurement of the exciter diffusion and development of a correction protocol.
- Development of a chemometric approach for the analysis of ydrocarbon mixtures.
- Implementation of the PIF method in the detector to measure traces of pesticides.
Project manager: Philippe Giamarchi
Researchers involved: Bernard Le Jeune
Collaborations: Olivier Mbaye, Senior Lecturer; Jean-Pierre Bakoum, PhD student; Laboratory of Photochemistry and Analysis (LPA), Cheikh Anta Diop University, Dakar. Jean-Jacques Aaron, Professor, University of Paris Marne la Vallée. Company HOCER, Brest.
Budget: Thesis grant obtained from the French Cooperation in Dakar.
Publications:
1 - Development of an on-site Early Warning Water Quality Monitoring System for pesticide detection by absorption and photo-induced fluorescence.
J. P. Bakhoum, N. A. Diop, E. T. Bodian, O. M. A. Mbaye, P. A. Diaw, L. Cisse, M. D. Gaye-Seye, D. D. Thiare, A. Coly, B. Le Jeune, P. Giamarchi.
Environmental Science and Pollution Research. 27, pages45238–45249 (2020).
http://dx.doi.org/10.1007/s11356-020-10406-x
Free full-text view-only:https://rdcu.be/b6dw3
2 - Development of thermochemically induced fluorescence (TIF) method for the determination of insecticide deltamethrin in Senegalese natural waters.
D. Diouf, D. D. Thiaré, D. Sarra, P. A. Diaw, K. Kital, O. M. A. Mbaye, S. O. Sarr, Mame D. Gaye-Seye, P. Giamarchi, A. Coly.
International J. of Environmental Analytical Chem. Published online: 30 Jul 2020.
https://doi.org/10.1080/03067319.2020.1796997
3 - Analyze of oxadiazon herbicide in natural waters by a micellar-enhanced photo-induced fluorescence.
J. P. Bakhoum, O. M. A. Mbaye, P. A. Diaw, L. Cisse, M. Mbaye, M. D. Gaye-Seye, A. Coly, B. Le Jeune, P. Giamarchi.
Analytical Sciences, 2020, Vol 20, N° 4, 447-452. DOI: 10.2116/analsci.19P390
4 - Development of a new automatic on-site detector of pesticides in natural waters by photo induced fluorescence, application to three phenylurea and benzoylurea herbicide.
J. P. Bakhoum, O. M. A. Mbaye, P. A. Diaw, M. Mbaye, L. Cisse, M. D. Gaye-Seye, J-J. Aaron, A. Coly, B. Le Jeune, P. Giamarchi.
Spectrochemica Acta Part A, 2019, Vol 214, Pages 285-293.
DOI: 10.1016/j.saa.2019.02.034.
5 - Combination of photo-induced fluorescence and GC-MS for elucidating the photo degradation mechanisms of diflubenzuron and fenuron pesticides
P. A. Diaw, O. M. A. Mbaye, D. D. Thiaré, N. Oturan, M. D. Gaye-Seye, A. Coly, B. Le Jeune, P. Giamarchi, M. A. Oturan, J.-J. Aaron.
Luminescence, 2019, Vol 34, N°5, 465-471. DOI: 10.1002/bio.3612.
6 - Ultraviolet photo-induced fluorescence followed by laser excitation (UV-PIF-LE) for the determination of herbicides in natural waters.
J. P. Bakhoum, O. Mbaye, P. Diaw, M. Mbaye, L. Cisse, D. Gaye-Seye, J.J. Aaron, A. Coly, B. Le Jeune, P. Giamarchi.
Analytical Letters, 2019, Vol 52, N° 17, 2782-2793.
DOI: 10.1080/00032719.2019.1604724.
7 - Development of online automatic detector of hydrocarbons and suspended organic matter by simultaneously acquisition of fluorescence and scattering
Mbaye M., Diaw P.A., Gaye-Saye, D. Le Jeune B., Cavalin G., Denis L., Aaron J.J. Delmas R., Giamarchi P.
Spectrochemica Acta Part A, 2018, Vol 192, 117-127.
http://www.sciencedirect.com/science/article/pii/S1386142517308892
8 - A new direct laser photo-induced fluorescence method coupled on-line with liquid chromatographic separation for the simultaneous determination of anilides pesticides.
Mbaye O., Maroto A., Gaye-Seye M.D., Stephan L., Deschamps L., Aaron J.J., Giamarchi P.
Talanta, 2015, Vol 132, 909-914.
http://www.sciencedirect.com/science/article/pii/S0039914014007322
9 - Determination of phenylurea pesticides by direct laser photo-induced fluorescence.
Diaw P.A., Maroto A., Mbaye O.M.A., Gaye-Seye M.D., Stephan L., Coly A., Deschamps L. , Tine A. , Aaron J.J. , Giamarchi P.
Talanta, 2013, Vol 116, 569-574. .
Published paper: http://dx.doi.org/10.1016/j.talanta.2013.07.014
10 - Direct Laser Photo-Induced Fluorescence Determination of Bisphenol A.
Maroto A., Kissingou P., Diascorn A., Benmansour B., Deschamps L., Stephan L., Cabon J.Y., Giamarchi P.
Analytical and Bioanalytical Chemistry, 2011, Vol 401, 3011-3017.
Published paper: http://rd.springer.com/article/10.1007/s00216-011-5375-7
11 - Spectroscopic properties and laser induced fluorescence determination of some endocrine disrupting compounds
Benmansour .B, Stephan L., Cabon J.Y., Deschamps L., Giamarchi P.
Journal of fluorescence, 2011, Vol 21, N°3, 843-850.
https://link.springer.com/article/10.1007/s10895-009-0583-7
13 - Characterization of the vertical size distribution, composition and chemical properties of dissolved organic matter in the (ultra)oligotrophic Pacific Ocean through a multi-detection approach.
P. Fourrier, G. Dulaquais, C. Guigue, P. Giamarchi, G. Sarthou, H. Whitby, R. Riso.
Marine Chemistry. Accepted.
