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Title:Validation of electroanalytical method with antimony electrode for trace metal analysis
Authors:ID Ramot, Aljaž (Author)
ID Finšgar, Matjaž (Mentor) More about this mentor... New window
ID Rajh, Barbara (Comentor)
Files:.pdf VS_Ramot_Aljaz_2017.pdf (2,32 MB)
MD5: E56BEBEDB7ED9123B4CECA7302E9DFCD
PID: 20.500.12556/dkum/c0d3a5fc-9bd9-4823-84e6-f1092515e2f5
 
Language:English
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:The purpose of this thesis is to validate the electroanalytical method with an antimony electrode for trace metal analysis. The validation began with the determination of the limit of detection (LOD) and the limit of quantification (LOQ), proceeded with determining the method’s linearity and concluded with determination of accuracy and precision. The trace metal analysis was conducted via square-wave anodic stripping voltammetry (SWASV). Cyclic voltammetry (CV) was used to test the reversibility of the [Fe(CN)6] 3/[Fe(CN)6] 4 system. All the analyses were conducted in a 0.01 M HCl solution. The LOD and LOQ were not possible to report with certainty, since the method has such a low LOD that the contamination with heavy metals, even in ultrapure acid, was too high. The method had a linear response at deposition potentials of 1.2 V, 1.1 V and 1.0 V vs. Ag/AgCl for Pb(II) and Cd(II) from 14.6 µg L 1 to 100.0 µg L 1. It has further been proven that the method is accurate and precise for all three deposition potentials at 15 µg L 1, 25 µg L 1, 30 µg L 1, 40 µg L 1 concentrations of analytes. The results have shown that the method is best used at a deposition potential of 1.1 V vs. Ag/AgCl.
Keywords:heavy metal analysis, trace analysis, antimony electrode, SWASV, voltammetry
Place of publishing:Maribor
Publisher:[A. Ramot]
Year of publishing:2017
PID:20.500.12556/DKUM-67929 New window
UDC:543.55:549.25(043.2)
COBISS.SI-ID:21059094 New window
NUK URN:URN:SI:UM:DK:RFFS88X0
Publication date in DKUM:28.09.2017
Views:1912
Downloads:222
Metadata:XML 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:04.09.2017

Secondary language

Language:Slovenian
Title:Validacija elektroanalizne metode z antimonovo elektrodo za analizo težkih kovin v sledovih
Abstract:Namen diplomskega dela je validacija elektroanalizne metode z antimonovo elektrodo za analizo težkih kovin v sledovih. Validacija se je pričela z določevanjem meje zaznavnosti (LOD) in meje kvantifikacije (LOQ), nadaljevala z določanjem linearnosti in končala z določanjem točnosti in natančnosti. Analiza težkih kovin je bila izvedena s square-wave anodno striping voltametrijo (SWASV), za testiranje reverzibilnosti sistema [Fe(CN)6] 3/[Fe(CN)6] 4 pa smo uporabili metodo ciklične voltametrije (CV). Vse analize so bile izvedene v 0,01 M raztopini HCl. Meje LOD in LOQ ni mogoče določiti z dovolj veliko gotovostjo, saj ima metoda tako nizko LOD, da je bila kontaminacija s težkimi kovinami, tudi v ultra čisti kislini, prevelika. Metoda ima linearen odziv pri potencialih depozicije 1,2 V, 1,1 V in 1,0 V vs. Ag/AgCl za Pb(II) in Cd(II) v območju od 14,6 µg L 1 do 100,0 µg L 1. Dokazano je tudi, da je metoda natančna in točna za vse tri potenciale depozicije pri koncentraciji analitov 15 µg L 1, 25 µg L 1, 30 µg L 1, 40 µg L 1. Ugotovljeno je bilo, da je metoda najbolj uporabna pri potencialu depozicije 1,1 V vs. Ag/AgCl.
Keywords:Analiza težkih kovin, analitika sledov, antimonova elektroda, SWASV, voltametrija.


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