Določevanje kovin v vzorcih vina z atomsko absorpcijsko in atomsko emisijsko spektroskopijo

Kočevar, Klara (author), Kočar, Drago (mentor)

V treh vzorcih vin sem z atomsko absorpcijsko in atomsko emisijsko spektroskopijo določevala koncentracije bakra, železa, natrija in kalija. Vzorca 1 in 3 sta bila vzorca belega vina, vzorec 2 pa je bil rdeče vino. Ugotavljala sem vpliv matrice oziroma topila na določitev kovin z eksternim standardom in s standardnim dodatkom. Primerjala sem določitve v deionizirani vodi, 10% etanolu, 1% HNO3 in 1% HCl. Ugotovila sem, da se rezultati v različnih topilih in vrstah vin razlikujejo, kar je lahko posledica vpliva matrice na določevanje. Koncentracije določene z metodama AAS in AES so primerljive.

• Language: Slovenian
• Keywords: Vino, kalij, natrij, železo, baker, AAS, AES, standardni dodatek.
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FKKT - Faculty of Chemistry and Chemical Technology
• Year: 2019
• PID: 20.500.12556/RUL-109509
• COBISS.SI-ID: 1538311363
• Publication date in RUL: 04.09.2019

Secondary language

• Language: English

Abstract

Determination of copper, iron, sodium and potassium in wine samples by atomic absorption and atomic emission spectroscopy in three wine samples. Samples number 1 and number 3 were white wine and sample number 2 was a red wine. To determine the influence of matrix or solvent on the analysis I used external standard calibration and standard addition methods. I also compared concentrations of analytes in deionized water, 10% ethanol, 1% HNO3 and 1% HCl. My results varied in different solvents and types of wine, which may be the consequence of the complex matrix. Concentrations determined by atomic absorption and atomic emission spectroscopy were similar.

• Keywords: Wine, potassium, sodium, iron, copper, AAS, AES, standard addition.