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26 results on '"Tsipi, Despina"'

1. Handheld Methanol Detector for Beverage Analysis: Interlaboratory Validation

Author

van den Broek, Jan, primary, Keller, Sebastian D., additional, Goodall, Ian, additional, Parish-Virtue, Katie, additional, Bauer-Christoph, Claudia, additional, Fuchs, Johannes, additional, Tsipi, Despina, additional, Güntner, Andreas T., additional, Blum, Thomas, additional, Mathurin, Jean-Charles, additional, Steiger, Matthias G., additional, Shirvani, Roghayeh, additional, Gössinger, Manfred, additional, Graf, Monika, additional, Anderhub, Peter, additional, Z'graggen, Daniel, additional, Hüsser, Claudio, additional, Faigle, Benjamin, additional, and Agapios, Agapiou, additional

Published
2024
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2. Fingerprinting Chemical Markers in the Mediterranean Orange Blossom Honey: UHPLC-HRMS Metabolomics Study Integrating Melissopalynological Analysis, GC-MS and HPLC-PDA-ESI/MS

Author

Kasiotis, Konstantinos M., primary, Baira, Eirini, additional, Iosifidou, Styliani, additional, Manea-Karga, Electra, additional, Tsipi, Despina, additional, Gounari, Sofia, additional, Theologidis, Ioannis, additional, Barmpouni, Theodora, additional, Danieli, Pier Paolo, additional, Lazzari, Filippo, additional, Dipasquale, Daniele, additional, Petrarca, Sonia, additional, Shairra, Souad, additional, Ghazala, Naglaa A., additional, Abd El-Wahed, Aida A., additional, El-Gamal, Seham M. A., additional, and Machera, Kyriaki, additional

Published
2023
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3. List of Contributors

Author

Adaime, Martha B., primary, Agüera, Ana, additional, Arrebola-Liébanas, Franciso Javier, additional, Bernardi, Gabrieli, additional, Botitsi, Helen, additional, Burgess, Jennifer A., additional, Campos-Mañas, Marina Celia, additional, Cleland, Gareth, additional, Economou, Anastasios, additional, Ferrer, Imma, additional, Garrido Frenich, Antonia, additional, Galceran, M.T., additional, García-Reyes, Juan F., additional, Gilbert-López, Bienvenida, additional, Martínez-Piernas, Ana Belén, additional, Molina Díaz, Antonio, additional, Moreno-González, David, additional, Moyano, E., additional, Mullin, Lauren, additional, Nortes-Méndez, Rocío, additional, Sivaperumal, P., additional, Prestes, Osmar D., additional, Romero-González, Roberto, additional, Thurman, E. Michael, additional, Tsipi, Despina, additional, Zanella, Renato, additional, and Zweigenbaum, Jerry A., additional

Published
2017
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5. Characterization of Ikaria Heather Honey by Untargeted Ultrahigh-Performance Liquid Chromatography-High Resolution Mass Spectrometry Metabolomics and Melissopalynological Analysis

Author

Kasiotis, Konstantinos M., primary, Baira, Eirini, additional, Iosifidou, Styliani, additional, Bergele, Kyriaki, additional, Manea-Karga, Electra, additional, Theologidis, Ioannis, additional, Barmpouni, Theodora, additional, Tsipi, Despina, additional, and Machera, Kyriaki, additional

Published
2022
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25. Identification of photocatalytic degradation products of diazinon in TiO2 aqueous suspensions using GC/MS/MS and LC/MS with quadrupole time-of-flight mass spectrometry

Author

Kouloumbos, Vasilis N., Tsipi, Despina F., Hiskia, Anastasia E., Nikolic, Dejan, and van Breemen, Richard B.

Subjects
*PHOTOCATALYSIS, *DIAZINON, *INSECTICIDES
Abstract

The photocatalytic degradation of the organophosphorus insecticide diazinon in aqueous suspensions has been studied by using titanium dioxide as a photocatalyst. The degradation of the insecticide was a fast process and included the formation of several intermediates that were identified using GC/ion-trap mass spectrometry with EI or CI in positive and negative ionization mode and HPLC/electrospray-QqTOF mass spectrometry. Since primarily hydroxy derivatives were identified in these aqueous suspensions, the mechanism of degradation was probably based on hydroxyl radical attack. The initial oxidative pathways of the degradation of diazinon involved the substitution of sulfur by oxygen on the P&z.dbnd6;S bond, cleavage of the pyrimidine ester bond, and oxidation of the isopropyl group. Exact mass measurements of the derivatives allowed the elemental formula of the molecules to be determined confidently. Similarities to the metabolic pathways occurring in living organisms were observed. [Copyright &y& Elsevier]

Published
2003
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26. Determination of acidic pesticides in the drinking water of Greece using capillary gas chromatography-mass spectrometry

Author

Heberer, Thomas, Hiskia, Anastasia, Tsipi, Despina, and Stan, Hans-Jurgen

Subjects
DRINKING water, PESTICIDE monitoring, GAS chromatography/Mass spectrometry (GC-MS)
Abstract

There is no data currently available on acidic pesticides in the drinking water of Greece, although considerable quantities of them are in use. In this study, the occurrence of the six most important acidicherbicides in the drinking water of Greece was investigated. The target compounds studied include four chlorophenoxy herbicides, namely mecoprop, dichlorprop, MCPA and 2,4-D, and two other acidic herbicides, i.e. bromoxynil and bentazone. Analysis was carried out at a concentration level of 100 ng L-1 using capillary gas chromatography-mass spectrometry (GC-MS) with selected ion monitoring (SIM). The method involved a pre-concentration with solid phase extraction andderivatization with pentafluorobenzyl bromide. Thirty-eight samples of drinking water from nine regions in Greece were screened. No herbicides were detected although fortification experiments with parallel water samples resulted in recovery rates better than 70%. The detection limits of the recovered compounds were found to be between 10 and 50 ng L-1. [ABSTRACT FROM AUTHOR]

Published
1998
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