Guia docente 2023_24 Facultade de Química

Analytical Chemistry III: Electroanalytical Methods and Separations

Contents

Topic	Sub-topic
UNIT 1.- Electroanalysis in the measurement step. Fundamentals of electrometric methods.	Redox and electrochemical chemical reactions. Interface electrode / dissolution. Transportation phenomena. Electrolysis and model of stationary diffusion. Classification of electrometric techniques. Instrumentation: basic components in potentiometric systems, conductimetric and potentiostatic / galvanostatic.
UNIT 2.- Electrodes and cells.	Working, reference and auxiliary electrodes. Working Electrodes: ISE, ISFET, solids (metallic and carbon), liquids (Hg), screen-printed electrodes (SPE) and modified. Supporting electrolytes and solvents. Cell configuration in electroanalysis and equivalent circuit. Calibration, the role of blank in electroanalysis and calculation of analytical parameters. Direct measurement and measurement after sample treatment: separation and derivatization in electroanalysis. Validation.
UNIT 3.- Conductimetry and potentiometry.	Conductometric analysis. Potentiometric analysis. Conductometric and potentiometric titrations. Analytical applications
UNIT 4.- Electroanalysis in dynamic systems I.	Coulombimetry, chronocoulombimetry and coulometric titrations. Analytical applications. Chronoamperometry and amperometry.Linear sweep voltammetry (LSV) and cyclic (CV). Processes of electrode for organic and inorganic compounds and criteria. Analytical applications.
UNIT 5.- Electroanalysis in dynamic systems II.	Pulse techniques: normal pulse voltammetry (NPV), differential pulse(DPV), square wave (SWV). Alternate current techniques (AC). Stripping techniques. Hybrid techniques and couplings. Analytical applications. Reflections and comparative study with others analytical techniques.
UNIT 6.- Fundamentals and aims of the separations in analytical chemistry.	Treatment of sample by digestion. Preparation of the sample: purification and pre-concentration. Studies of recovery.
UNIT 7.- Non-chromatographic Separations.	Precipitation, Leaching, Volatilisation and Distillation (lyophilisation, Kjeldhal, Willard-Winter), Electrodeposition and stripping.
UNIT 8.- Extraction	Liquid-liquid extraction, S-L extraction (Soxhlet, Assisted Extraction by Ultrasonic, microwave and accelerated-ASE), microextraction and solid phase extraction (SPE).
LABORATORY EXPERIMENTS	Experiments related to the contents in electroanalysis and non-chromatographic separations, applying the analytical process and including the evaluation and data processing, as well as the delivery of reports.