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Title:Razvoj in validacija modificirane Bi-Sn elektrode
Authors:Vodopivec, Katja (Author)
Finšgar, Matjaž (Mentor) More about this mentor... New window
Petovar, Barbara (Co-mentor)
Files:.pdf MAG_Vodopivec_Katja_2018.pdf (3,90 MB)
MD5: 0CAEBE6BAB287001D277FE4DD5BB88F6
 
Language:Slovenian
Work type:Master's thesis/paper (mb22)
Typology:2.09 - Master's Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Magistrsko delo prikazuje študijo delne validacije elektroanalizne metode z in situ modificirano bizmut-kositrovo elektrodo iz steklastega ogljika za analizo težkih kovin Zn(II), Cd(II) in Pb(II) v sledovih. Analizo smo izvajali s tehniko square-wave anodne striping voltametrije (SWASV), reverzibilnost sistema pa smo preverili s pomočjo ciklične voltametrije (CV) za analizo kalijevega heksacianoferata. Pri validaciji smo izvedli določitev meje zaznavnosti (LOD) in meje določljivosti (LOQ) za 12 modificiranih Bi-Sn-elektrod iz steklastega ogljika z različnimi koncentracijskimi sestavami Bi(III) in Sn(II). Kasneje smo določili območja linearnosti za Zn(II), Cd(II) in Pb(II) z uporabo vsake izmed dvanajstih elektrod posebej. Preverili smo točnost in ponovljivost elektrod s pomočjo t-testa in izračuna RSD. Ugotovljeno je bilo, da je najbolj optimalna elektroda tista, za katero smo pri njeni in situ pripravi uporabili 0,5 mg L–1 Bi(III) in Sn(II) v razmerju 0,4 : 0,6. S pomočjo te elektrode smo preučili vpliv interferenc na izbrane analite – Zn(II), Cd(II) in Pb(II) ter izmerili dva realna vzorca.
Keywords:elektrokemija, voltametrija, elektroda iz steklastega ogljika, Bi-Sn modificirana elektroda iz steklastega ogljika, validacija analizne metode
Year of publishing:2018
Publisher:[K. Vodopivec]
Source:Maribor
UDC:542.87:543.55(043.2)
COBISS_ID:21794070 New window
NUK URN:URN:SI:UM:DK:5SE7NQKR
Views:882
Downloads:176
Metadata:XML RDF-CHPDL DC-XML DC-RDF
Categories:KTFMB - FKKT
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:19.06.2018

Secondary language

Language:English
Title:Development and validation of a Bi-Sn electrode
Abstract:This master's thesis presents a partial validation study of an electroanalytic method of in situ plated bismuth-tin-film modified glassy carbon electrode for the trace analysis of Zn(II), Cd(II) and Pb(II) heavy metals. The analysis was carried out using square-wave anodic stripping voltammetry (SWASV) technique and the reversibility of the system was checked by cyclic voltammetry (CV) using potassium hexacyanoferrate system. The validation began with determination of the detection limit (LOD) and the quantification limit (LOQ) for 12 modified Bi(III)-Sn(II)-film glassy carbon electrodes with different concentration ratios of Bi(III) and Sn(II), followed by method's linearity determination. We validated the accuracy and reproducibility of electrodes using t-test and RSD values. The results have shown that the most optimal electrode is the one for which 0.5 mg L-1 Bi (III) and Sn (II) with the 0.4:0.6 ratio was used in its in situ plating solution. Using this electrode we studied the influence of interferences on selected analytes - Zn (II), Cd (II), and Pb (II), and used the method for two real samples.
Keywords:electrochemistry, voltammetry, glassy carbon electrode, Bi-Sn modified glassy carbon electrode, validation of the analytical method


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