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Pavanello A, Miranda MA, Marin ML. Organic photoredox catalysts for wastewater remediation: Beyond the established advanced oxidation processes. CHEMICAL ENGINEERING JOURNAL ADVANCES 2022. [DOI: 10.1016/j.ceja.2022.100296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Groeneveld I, Bagdonaite I, Beekwilder E, Ariese F, Somsen GW, van Bommel MR. Liquid Core Waveguide Cell with In Situ Absorbance Spectroscopy and Coupled to Liquid Chromatography for Studying Light-Induced Degradation. Anal Chem 2022; 94:7647-7654. [PMID: 35587271 PMCID: PMC9161219 DOI: 10.1021/acs.analchem.2c00886] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
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In many areas, studying
photostability or the mechanism of photodegradation
is of high importance. Conventional methods to do so can be rather
time-consuming, laborious, and prone to experimental errors. In this
paper we evaluate an integrated and fully automated system for the
study of light-induced degradation, comprising a liquid handler, an
irradiation source and exposure cell with dedicated optics and spectrograph,
and a liquid chromatography (LC) system. A liquid core waveguide (LCW)
was used as an exposure cell, allowing efficient illumination of the
sample over a 12 cm path length. This cell was coupled to a spectrograph,
allowing in situ absorbance monitoring of the exposed sample during
irradiation. The LCW is gas-permeable, permitting diffusion of air
into the cell during light exposure. This unit was coupled online
to LC with diode array detection for immediate and automated analysis
of the composition of the light-exposed samples. The analytical performance
of the new system was established by assessing linearity, limit of
detection, and repeatability of the in-cell detection, sample recovery
and carryover, and overall repeatability of light-induced degradation
monitoring, using riboflavin as the test compound. The applicability
of the system was demonstrated by recording a photodegradation time
profile of riboflavin.
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Affiliation(s)
- Iris Groeneveld
- Division of Bioanalytical Chemistry, Amsterdam Institute for Molecular and Life Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands
| | - Ingrida Bagdonaite
- Division of Bioanalytical Chemistry, Amsterdam Institute for Molecular and Life Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands
| | - Edwin Beekwilder
- Da Vinci Laboratory Solutions, Sydneystraat 5, 3047 BP Rotterdam, The Netherlands
| | - Freek Ariese
- LaserLaB, Vrije Universiteit Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - Govert W Somsen
- Division of Bioanalytical Chemistry, Amsterdam Institute for Molecular and Life Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands
| | - Maarten R van Bommel
- Analytical Chemistry Group, van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands.,Conservation and Restoration of Cultural Heritage, Amsterdam School for Heritage, Memory and Material Culture, University of Amsterdam, P.O. Box 94552, 1091 GN Amsterdam, The Netherlands
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Hashemi-Shahraki F, Shareghi B, Farhadian S. Characterizing the binding affinity and molecular interplay between quinoline yellow and pepsin. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117317] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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