Direct solid surface fluorescence spectroscopy of standard chemicals and humic acid in ternary system
| Autor: | Débora Marcondes Bastos Pereira Milori, Stéphane Mounier, Gustavo Nicolodelli, Roland Redon |
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| Přispěvatelé: | Institut méditerranéen d'océanologie (MIO), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Embrapa Instrumentation (CNPDIA), National Nanotechnology Laboratory for Agriculture (LNNA), DEBORA MARCONDES BASTOS PEREIRA, CNPDIA. |
| Rok vydání: | 2017 |
| Předmět: |
Front face fluorescence spectroscopy
02 engineering and technology complex mixtures 01 natural sciences Fluorescence spectroscopy Analytical Chemistry Solid state Absorbance Boric acid Front Face Fluorescence Spectroscopy chemistry.chemical_compound Boric Acids [CHIM.ANAL]Chemical Sciences/Analytical chemistry Mixture Humic acid Laser-induced fluorescence Instrumentation Humic Substances Spectroscopy chemistry.chemical_classification Chromatography Lasers 010401 analytical chemistry Tryptophan Models Theoretical Reference Standards 021001 nanoscience & nanotechnology Fluorescence Atomic and Molecular Physics and Optics 0104 chemical sciences Spectrometry Fluorescence Solid State chemistry Quinine Sulfate Factor Analysis Statistical 0210 nano-technology Nuclear chemistry |
| Zdroj: | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy [1994-...] Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy [1994-..], 2017, 177, pp.79-85. ⟨10.1016/j.saa.2017.01.017⟩ Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy [1994-..], Elsevier, 2017, 177, pp.79-85. ⟨10.1016/j.saa.2017.01.017⟩ Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA-Alice) Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
| ISSN: | 1386-1425 1873-3557 |
| DOI: | 10.1016/j.saa.2017.01.017 |
| Popis: | International audience; The front face fluorescence spectroscopy is often used to quantify chemicals in well known matrices as it is a rapid and powerful technique, with no sample preparation. However it was not used to investigate extracted organic matter like humic substances. This work aims to fully investigate for the first time front face fluorescence spectroscopy response of a ternary system including boric acid, tryptophan and humic substances, and two binaries system containing quinine sulfate or humic substance in boric acid. Pure chemicals, boric acid, tryptophan, quinine sulfate and humic acid were mixed together in solid pellet at different contents from 0 to 100% in mass. The measurement of excitation emission matrix of fluorescence (3D fluorescence) and laser induced fluorescence were then done in the front face mode. Fluorescence matrices were decomposed using the CP/PARAFAC tools after scattering treatments. Results show that for 3D fluorescence there is no specific component for tryptophan and quinine sulfate, and that humic substances lead to a strong extinction effect for mixture containing quinine sulfate. Laser induced fluorescence gives a very good but non specific related response for both quinine sulfate and tryptophan. No humic substances fluorescence response was found, but extinction effect is observed as for 3D fluorescence. This effect is stronger for quinine sulfate than for tryptophan. These responses were modeled using a simple absorbance versus emission model. |
| Databáze: | OpenAIRE |
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