Modifikacija ogljikove SPE-elektrode z molibdenom za voltametrično določanje tiametoksama

diplomsko delo

Mitja Koderman (Author), Mitja Kolar (Mentor)

Abstract

Neonikotinoidi so novi nikotinu podobni sistemski insekticidi. V zadnjih letih ima njihova uporaba negativen vpliv na opraševalce, zato je pomembno, da se spremlja njihovo prisotnost in vsebnost v okolju. Za njihovo določanje predstavljajo alternativo kromatografskim tehnikam elektrokemijski senzorji, vendar še niso široko uporabni in komercialno dostopni. V sklopu diplomskega dela sem s ciklično voltametrijo preizkusil nekatere modifikacije SPE-elektrod z različnimi nanodelci in kot najboljšo možnost izbral molibdenovo modifikacijo za določanje tiametoksama. Optimalen pH za določanje tega analita je v bližini nevtralnega. Na tokovni odziv in redukcijski potencial vpliva tudi vrsta in koncentracija pomožnega elektrolita. Z voltametrijo s pravokotnimi valovi sem preizkusil še linearen odziv elektrode na tiametoksam.

Keywords

elektrokemija;elektrokemijski členi;SPE-elektrode;molibden;modifikacija;neonikotinoidi;diplomska dela;

Data

Language:	Slovenian
Year of publishing:	2022
Typology:	2.11 - Undergraduate Thesis
Organization:	UL FKKT - Faculty of Chemistry and Chemical Technology
Publisher:	[M. Koderman]
UDC:	543.552(043.2)
COBISS:	116881411
Views:	109
Downloads:	48
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Voltammetric determination of thiamethoxam using molybdenum-modified screen-printed carbon electrode
Secondary abstract:	Neonicotinoids are novel nicotine-like systemic insecticides. In recent years, their use has negatively impacted pollinators, making it important to monitor their presence in the environment. Electrochemical sensors provide an alternative to chromatographic methods for their determination, but are not yet widely and commercially available. In this work, I tested the modification of SPE electrodes with different nanoparticles by cyclic voltammetry and chose molybdenum modification as the best option for the determination of thiamethoxam. The optimal pH for the determination of this analyte is in the neutral range. The type and concentration of the supporting electrolyte also affect the current response and reduction potential. I have also demonstrated the linear response of the electrode to thiamethoxam by square wave voltammetry.
Secondary keywords:	neonicotinoids;SPE electrodes;molybdenum;electrode modification;voltammetry;Voltametrija;Univerzitetna in visokošolska dela;
Type (COBISS):	Bachelor thesis/paper
Study programme:	1000373
Embargo end date (OpenAIRE):	1970-01-01
Thesis comment:	Univ. v Ljubljani, Fak. za kemijo in kemijsko tehnologijo, UNI Kemija
Pages:	47 str.
ID:	15841041