Repository of University of Nova Gorica

Show document
A+ | A- | SLO | ENG

Title:Heavy metal analysis with in-situ prepared copper film electrode as a tool for environmental monitoring
Authors:Hrastnik, Nana Ivana (Author)
Jovanovski, Vasko (Mentor) More about this mentor... New window
Files:.pdf Nana_Ivana_Hrastnik.pdf (1,78 MB)
 
Language:English
Work type:Master's thesis/paper (mb22)
Tipology:2.09 - Master's Thesis
Organization:FZO - Faculty of Environmental Sciences
Abstract:Monitoring and measuring heavy metals in the environment is of great importance and requires sensitive and reliable analytical techniques capable of detecting trace level concentrations. Nowadays, measurements of heavy metals are usually performed using sophisticated and expensive instrumental techniques, such as atomic absorption spectroscopy (AAS), atomic fluorescence spectroscopy (AFS), inductively coupled plasma mass spectrometry (ICP-MS), inductively coupled plasma optical emission spectroscopy (ICP-OES) etc. In this aspect, advanced electroanalytical (stripping) techniques represent a favourable alternative, facilitating sensitive and selective measurements of various analytes using relatively simple, portable and non-expensive instrumentation. This work is an investigation of novel copper-based electrodes for measuring trace levels of selected heavy metal ions, i.e. mercury(II), lead(II), tin(IV) and nickel(II). The methods of choice were anodic stripping voltammetry (ASV) in combination with the in-situ prepared copper film electrode (CuFE) for measuring low concentrations of mercury(II) and lead(II) (simultaneously) and tin(IV) in the test solutions and adsorptive cathodic stripping voltammetry (AdCSV) for determination of nickel(II). Metal-film electrodes are regularly employed in electrochemical stripping analysis due to their simple fabrication and surface regeneration. The newly developed CuFE appears to be a cheaper alternative to gold-based electrodes with several attractive electroanalytical characteristics, i.e. with low limits of detection (LOD), good repeatability and favourable linear response.
Keywords:Copper film electrode, anodic stripping voltammetry, adsorptive cathodic stripping voltammetry, heavy metals, environment.
Year of publishing:2017
Source:Nova Gorica
COBISS_ID:4914427 Link is opened in a new window
Views:198
Downloads:20
Metadata:XML RDF-CHPDL DC-XML DC-RDF
Categories:Document is not linked to any category.
:
  
Average score:(0 votes)
Your score:Voting is allowed only for logged in users.

Hover the mouse pointer over a document title to show the abstract or click on the title to get all document metadata.

Secondary language

Language:Slovenian
Title:Določevanje težkih kovin z in-situ pripravljeno tankoslojno bakrovo elektrodo kot orodje za monitoring v okolju
Abstract:Nadzorne meritve kovin v sledovih v okolju so vse pomembnejše in zahtevajo uporabo občutljivih ter zanesljivih analiznih tehnik in senzorjev. Dandanes se za merjenje kovin v sledovih večinoma uporabljajo kompleksne in drage občutljive instrumentalne tehnike, kot so atomska absorpcijska spektroskopija (AAS), atomska fluorescenčna spektroskopija (AFS), optična emisijska spektroskopija z induktivno sklopljeno plazmo (ICP-OES), masna spektrometrija z induktivno sklopljeno plazmo (ICP-MS) itd. Elektroanalizne (stripping) tehnike predstavljajo zanimivo alternativo zgoraj omenjenim tehnikam, saj omogočajo občutljivo in selektivno merjenje različnih analitov z uporabo enostavnih, prenosnih in cenejših instrumentov. V magistrskem delu je predstavljena raziskava uporabe elektrokemijskih analiznih metod na osnovi tankoslojne bakrove elektrode za določitev nizkih koncentracij dvovalentnih ionov živega srebra, svinca, kositra in niklja v testnih raztopinah ter realnem vzorcu. Na podlagi eksperimentalnih rezultatov sem v kombinaciji z in-situ pripravljeno tankoslojno bakrovo elektrodo za določitev nizkih koncentracij Hg(II) in Pb(II) sočasno v testni raztopini in za Sn(IV) uporabili anodno stripping voltametrijo ter za določitev Ni(II) adsorpcijsko katodno stripping voltametrijo. Tankoslojne kovinske elektrode se v elektrokemijski analizi običajno uporabljajo zaradi svoje preproste priprave in možnosti regeneracije elektrodne površine. Značilnost tankoslojne bakrove elektrode, v primerjavi z bolj razširjeno zlato elektrodo, je večja občutljivost, nizka meja zaznave (LOD), odlična ponovljivost merjenja in linearni odziv v širokem delovnem območju.
Keywords:Tankoslojna bakrova elektroda, anodna stripping voltametrija, adsorptivna katoda stripping voltametrija, težke kovine, okolje.


Back