<p><!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:PunctuationKerning /> <w:ValidateAgainstSchemas /> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:Compatibility> <w:BreakWrappedTables /> <w:SnapToGridInCell /> <w:WrapTextWithPunct /> <w:UseAsianBreakRules /> <w:DontGrowAutofit /> </w:Compatibility> <w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel> </w:WordDocument> </xml><![endif]--><!--[if gte mso 9]><xml> <w:LatentStyles DefLockedState="false" LatentStyleCount="156"> </w:LatentStyles> </xml><![endif]--><!--[if gte mso 10]> <mce:style><! /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0pt 5.4pt 0pt 5.4pt; mso-para-margin:0pt; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} --><!--[endif] --></p><p class="MsoBodyText" style="margin-bottom: 0.0001pt;">U disertaciji je izvr&scaron;ena voltametrijska karakterizacija i određivanje pet&nbsp;neonikotinoidnih insekticida (imidakloprida, tiametoksama, klotianidina, nitenpirama i&nbsp;acetamiprida) na različitim elektrodama na bazi ugljenika, kao &scaron;to su elektroda od&nbsp;ugljenične paste, elektroda od staklastog ugljenika i bizmut-filmom modifikovani&nbsp;staklasti ugljenik. Pored ispitivanja u model-rastvorima, razvijene visokoosetljive&nbsp;diferencijalne pulsne voltametrijskemetode su primenjene za određivanje neonikotinoida&nbsp;u realnim uzorcima. Neonikotinoidi su određivani u uzorcima rečne vode i komercijalnim&nbsp;formulacijama, a praćena je i njihova fotolitička i fotokatalitička razgradnja. Radi&nbsp;potvrđivanja voltametrijskih rezultata, izvedena su komparativna merenja uz primenu&nbsp;tečne hromatografije sa detektorom od niza dioda i infracrvenespektrometrije. Detekcija&nbsp;pojedinih degradacionih proizvoda nastalih u toku ispitivanih fotodegradacionih procesa&nbsp;je praćena tečnohromatografskom metodom sa tandemskom masenospektrometrijskom&nbsp;detekcijom. Proučavana je povr&scaron;inska struktura CR 5 grafitnog praha, elektrode od&nbsp;ugljenične paste na bazi trikrezil-fosfata i elektrode od staklastog ugljenika pomoću&nbsp;skenirajuće elektronske mikroskopije.</p> / <p>This thesis is concerned with the voltammetric characterization and&nbsp;determination of five neonicotinoid insecticides (imidacloprid, thiamethoxam,&nbsp;clothianidin, nitenpyram and acetamiprid) at different carbon-based electrodes such as&nbsp;carbon paste, glassy carbon and bismuth-film modified glassycarbon. In addition to the&nbsp;investigations in model solutions, the developed highly sensitive differential pulse&nbsp;voltammetric methods were applied for the determination of neonicotinoids in real&nbsp;samples. Neonicotinoids were determined in river water samples, commercial&nbsp;formulations, and their photolytic and photocatalytic degradation was also monitored. To&nbsp;confirm the voltammetric results, comparative measurements were performed by liquid&nbsp;chromatography with diode-array detector and infrared spectrometry. Detection of some&nbsp;degradation products formed during the photodegradation processes was monitored using&nbsp;liquid chromatography with tandem mass-spectrometric detection. The surface structure&nbsp;of CR 5 graphite powder, tricresyl phosphate-based carbon paste electrode and glassy&nbsp;carbon electrode was investigated by scanning electron microscopy.</p>