Determination of important azoles in soil solution using CE

0508879 - ÚOCHB 2020 RIV AT eng J - Článek v odborném periodiku
Takala, N. - Sirén, H. - Jakl, M. - Jaklová Dytrtová, Jana
Determination of important azoles in soil solution using CE.
Monatshefte fur Chemie. Roč. 150, č. 9 (2019), s. 1625-1631. ISSN 0026-9247. E-ISSN 1434-4475
Grant CEP: GA ČR(CZ) GA18-01710S
Institucionální podpora: RVO:61388963
Klíčová slova: triazoles * CE-PDA * separation * fungicides * ESI-mu-Q-TOF-MS
Obor OECD: Analytical chemistry
Impakt faktor: 1.349, rok: 2019
Způsob publikování: Omezený přístup
https://link.springer.com/article/10.1007/s00706-019-02447-x

The azoles (represented by penconazole, cyproconazole, and tebuconazole in this study) are frequently used agrochemicals to protect various crops against mildew and fungi. They are considered as endocrine disruptors, because they block the biosynthesis (on the level of enzymes inhibition) of biochemicals with steroid structure. Besides targeted impacts, they can partly get into the soil with the rainfall or litter fall and influence/block the biosynthesis of sterols of non-target organisms. In this sense, the risk of disruption of rhizosphere plant-microbial symbiosis and dynamic processes in the soil solution by azoles is of high importance to be evaluated. We have developed an analytical methodology for determination of penconazole, cyproconazole, and tebuconazole in soil solution using capillary electrophoresis with a photodiode array detector at UV-214 nm and acidic electrolyte solution (pH 1.48). The results were also compared with mass spectrometric measurements using mu-TOF mass spectrometry. There approx. 90% of present azoles were bound in the soil solution matrix. The detection limit for these azoles is about 10(-7) mol dm(-3). Because of very low pK(a) of azoles, we have to consider deprotonation of azoles and consequently the high affinity to create complexes with cations. The majority of present azoles in soil solution might form neutral adducts with mono-cations, making them invisible in electrospray mass spectra.
Trvalý link: http://hdl.handle.net/11104/0299676