Primerjava in lastnosti komercialnih fluoridnih ionoselektivnih elektrod

Šolaja, Špela (author), Kolar, Mitja (mentor)

V diplomski nalogi sem se osredotočila na lastnosti, uporbnost in funkcionalnost dveh različnih fluoridnih ionoselektivnih elektrod (F-ISE). S pomočjo več merilnih kriterijev, vključno z odzivnim časom elektrod na spremembo koncentracije fluoridnih ionov v raztopini, linearnostjo, mejo zaznave, interference in meddnevno ponovljivostjo, sem ugotovila, da obe elektrodi izpolnjujeta običajne merilne standarde. Elektrodi sta pokazali ustrezno linearnost z determinacijskim koeficientom R2 nad 0,99, kar zagotavlja točnost in zanesljivost meritev. Študija je pokazala, da interferenčni ioni in pH lahko vplivajo na zanesljivost meritev, pri čemer se je prva F-ISE izkazala za selektivnejšo. Poleg tega je študija potrdila visoko občutljivost obeh elektrod na nizke koncentracije fluorida. Sklepno lahko trdim, da izbrane nizkocenovne elektrode ne le izpolnjujejo standardov, ampak tudi ponujajo cenovno ugodno in zanesljivo rešitev za osnovne izvedbe analiz fluoridov.

• Language: Slovenian
• Keywords: fluoridna ionoselektivna elektroda, analizna kemija, zanesljivost, linearnost, interferenca, občutljivost
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FKKT - Faculty of Chemistry and Chemical Technology
• Year: 2023
• PID: 20.500.12556/RUL-151322
• COBISS.SI-ID: 173440515
• Publication date in RUL: 04.10.2023

Secondary language

• Language: English
• Title: Properties and comparison of commercially available fluoride ion-selective electrodes

Abstract

In the context of my thesis, I focused on the analysis of the reliability and functionality of two different fluoride-ion-selective electrodes (F-ISE) within the realm of analytical chemistry. Utilizing multiple evaluation criteria, including response time, linearity, detection limit, interference, and day-to-day repeatability, I found that both electrodes meet conventional measurement standards. Both F-ISEs displayed high linearity with a determination coefficient R2 exceeding 0,99, ensuring accuracy and reliability in measurements. The study revealed that interfering ions and pH could affect the reliability of the measurement, with the first F-ISE showing higher selectivity. Moreover, the analysis confirmed the high sensitivity of both electrodes to low fluoride concentrations. In conclusion, these cost-effective electrodes not only meet the required standards but also offer an affordable and reliable solution for analytical needs.

• Keywords: Fluoride-Ion-Selective Electrodes, Analytical Chemistry, Reliability, Linearity, Interference, Sensitivity