diplomska naloga
Simona Očko (Author), Mitja Kolar (Mentor), Darinka Brodnjak-Vončina (Co-mentor)

Abstract

Diplomsko delo opisuje potenciometrično določanje N-(2-merkaptopropionil)-glicina z uporabo različnih ionoselektivnih elektrod, njihove odzivne čase, ponovljivost, delovno območje, meje določljivosti in uporabnost v pretočni injekcijski analizi(PIA). Pri kemijski obdelavi srebrne žice v živosrebrovem (II)kloridu je na površini nastala siva plast, ki se je v raztopini MPG obarvala rahlo rjavo do rjavo rdeče. Delovno območje Ag/AgMPG elektrode je med 1x10-2 mol/L in 1x10-5 mol/L MPG pri naklonu 49,0 mV/p(MPG). Srebrna žica obdelana v raztopini živosrebrovega (II) klorida in nato potopljena v Na2S je na površini prevlečena s tanko črno plastjo srebrovega sulfida. Delovno območje te elektrode je med 1x10-2 mol/L in 1x10-5 mol/L pri naklonu 58,2 mV/p(MPG). Srebrna žica kemijsko obdelana v raztopini živosrebrovega (II)klorida in nato potopljena v raztopino KI tvori na površini rumenkasto plast srebrovega jodida. Delovno območje Ag/AgI elektrode je med 1x10-2 mol/L in 3x10-5 mol/L pri naklonu 52,7 mV/p(MPG). Tako pripravljene elektrode so primerne za klasične in pretočne potenciometrične meritve.

Keywords

glicin;pretočna injekcijska analiza;ionoselektivne elektode;potenciometrija;

Data

Language: Slovenian
Year of publishing:
Source: Maribor
Typology: 2.11 - Undergraduate Thesis
Organization: UM FKKT - Faculty of Chemistry and Chemical Engineering
Publisher: [S. Očko]
UDC: 543.554.547.466.22(043.2)
COBISS: 14401558 Link will open in a new window
Views: 2385
Downloads: 218
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Other data

Secondary language: English
Secondary title: Potentiometric determination of N-(2-mercaptopropionyl)-glycine
Secondary abstract: The study describes potenciometric determination of N-(2-mercaptopropionyl)-glycine (MPG) using different types of electrodes, their response time, their repeatability, working range, detection limit and their use in flow injection analysis (FIA). After the silver electrode was immersed into the solution of mercury (II)chloride, was on the surface gray layer which become slightly brown to brownish red when we immersed electrode into solution of MPG. Working range of Ag/AgMPG electrode is between 1x10-2 mol/L and 1x10-5 mol/L MPG with the slope of 49,0 mV. Sulfide ion-selective electrode was prepared with chemical pretreatment of the silver wire with mercury (II)chloride and solution of Na2S. On the surface thin black layer of silver sulphide was formed. Working range of this electrode is between 1x10-2 mol/L and 1x10-5 mol/L MPG with the slope of 58,2 mV. Silver wire chemically pretreated with mercury (II)chloride and the solution of KI, formed on the surface yellow layer of silver iodide. Working range of the electrode is between 1x10-2 mol/l and 3x10-5 mol/L with the slope of 52,7 mV. Electrodes prepared in such a way can be used in batch and flow injection measurements also for determination of N-(2-mercaptopropionyl)-glycine in real samples.
Secondary keywords: N-(2-mercaptopropionyl)-glycine;flow injection analysis;ion-selective electrodes;potentiometry;
URN: URN:SI:UM:
Type (COBISS): Undergraduate thesis
Thesis comment: Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo
Pages: XII, 52 f.
Keywords (UDC): mathematics;natural sciences;naravoslovne vede;matematika;chemistry;crystallography;mineralogy;kemija;analytical chemistry;analizna kemija;physicochemical methods of analysis (other than optical methods);
ID: 1011969