20.500.12556/RUL-162434 Merjenje pH v posebnih sistemih pH measurement in special systems Merjenje pH je od nekdaj bila, in je še vedno ena izmed najbolj pogosto uporabljenih analiznih metod v kemijski industriji. Je hitro in natančno merilo kislosti oziroma bazičnosti vseh vrst raztopin. Poznamo dve glavni metodi za merjenje pH, to sta kolorimetrična metoda z uporabo indikatorjev in elektrokemijska metoda z uporabo elektrod. Potenciometrično merjenje pH v naprimer prsteh, ki so ponavadi vodne suspenzije z anorganskimi delci, in v kremah, je zelo zapleteno zaradi pojava suspenzijskega efekta. Znani sta dve vrsti suspenzijskega efekta. Suspenzijski efekt I nastane zaradi Donnanskega potenciala na fazni meji med sedimentom in ravnotežno raztopino. Suspenzijski efekt II pa nastane zaradi anomalnega tekočinskega potenciala na meji med referenčno elektrodo in sedimentom. V mojem delu bom podrobneje opisala oba navedena efekta. Measurement of pH has always been, and still is, one of the most widely used analytical methods in the chemical industry. It is a fast and accurate measure of the acidity or basicity of all types of solutions. There are two main methods for measuring pH, the colorimetric method by using indicators and the electrochemical method by using electrodes. The potentiometric measurement of pH in soils, which are usually aqueous suspensions with inorganic particles, and in creams, is very complicated because of the occurrence of the suspension effect. Two types of suspension effect are known. Suspension effect I is due to the Donnan potential at the phase boundary between the sediment and the equilibrium solution. Suspension effect II is due to an anomalous liquid potential at the boundary between the reference electrode and the sediment. In my work, I will describe both effects in more detail. pH merjenje pH suspenzije suspenzijski efekt pH pH measurement suspension suspension effect true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2024-09-23 12:10:03 2024-09-23 12:10:09 2024-11-22 14:17:20 0000-00-00 00:00:00 2024 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 24176 216166403 Ogulin_Petra_-_Merjenje_pH_v_posebnih_sistemih.pdf Ogulin_Petra_-_Merjenje_pH_v_posebnih_sistemih.pdf 1 4CD249E959A13EE97C9803FA284CCDDE 0fd056bba22a7e023ac42148917ec09073dcc3c5feae086b507a7bdd28adeba6 e50b11a3-7993-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=191761 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0