Contribution to the Characterisation and Determination of some Neonicotinoids

Abstract

<p>U okviru ove doktorske disertacije pažnja je sa jedne strane posvećena razradi NMR&nbsp;spektrometrijskih i veoma osetljivih hromatografskih (HPLC/DADi HPLC/TLS) metoda, a sa&nbsp;druge strane razradi jednostavnijih spektrofotometrijskih i voltametrijskih metoda za određivanje&nbsp;odabranih neonikotinoida. Kao posebno vredan doprinos, razrađena je metoda pripreme ekolo&scaron;ki&nbsp;pogodne bizmut-film elektrode na staklastom ugljeniku i na planarnoj ugljeničnoj elektrodi.&nbsp;Efikasnost elektrode je upoređena sa elektrodom modifikovanom filmom od žive. Za ispitivanje&nbsp;povr&scaron;ine radnih elektroda primenjena je i (SEM/EDS) metoda. Razrađene metode su testirane za&nbsp;određivanje neonikotinoida iz komercijalnih formulacija, kao i iz uzoraka krompira, kukuruza,&nbsp;paprike, meda i povr&scaron;inske vode.</p>

<p>The Ph. D. thesis is concerned with the development of NMR spectrometric and very&nbsp;sensitive chromatographic (HPLC/DAD and HPLC/TLS) methods, on the one&nbsp; hand, and simpler&nbsp;spectrophotometric and voltammetric methods on the other, for the &nbsp;determination of selected&nbsp;neonicotinoids. As an especially valuable contribution, a procedure has&nbsp; been developed for the&nbsp;preparation of an environment-friendly bismuth film electrode on glassycarbon and planar&nbsp;carbon electrode. The achieved efficiency of such electrode was compared with that of mercury&nbsp;film electrode. Surface morphology of the working electrodes was studied by the SEM/EDS&nbsp;method. The developed methods have been tested for the determination of the neonicotinoids from&nbsp;their commercial formulations, as well as from samples of potato,&nbsp; maize, pepper, honey, and&nbsp;surface water.</p>