20.500.12556/RUL-142833 Merilna negotovost pri redčenju raztopine na volumen ali z volumnom Measurement uncertainty in dilution of solution to volume or with volume V diplomskem delu smo preverili merilno negotovost pri izbranih volumetričnih napravah in dejavnike, ki vplivajo na posamezno vrsto redčenja. Predstavili smo razlike med vrstami redčenja ter pojasnili potek do izračuna združene merilne negotovosti. V eksperimentalnem delu smo nato ugotavljali ponovljivost polnjenja volumetričnih priborov (bučke, polnilne pipete in batne pipete) s tehtanjem. Na podlagi eksperimentalnih rezultatov smo izračunali združene merilne negotovosti faktorja redčenja za oba primera redčenja. Ugotovili smo, da se območje merilne negotovosti faktorja redčenja pri redčenju na volumen pri posamezni volumetrični steklenici z večanjem volumna pipete zmanjšuje. Pri redčenju raztopine z volumnom se merilna negotovost faktorja redčenja z večanjem volumna dodatka s pipeto povečuje. Pri tem je največji vpliv na merilno negotovost imela ponovljivost polnjenja, kjer je tudi prišlo do manjših odstopanj. Paziti moramo, da polnimo čim bolj ponovljivo, uporabljamo čist in neokrušen pribor in delamo pri konstantnih pogojih (temperatura, tlak), da dobimo rezultate v določenem območju, saj vse te komponente vplivajo na merilno negotovost. In the diploma work, we evaluated the measurement uncertainty of selected volumetric instruments and the factors that influence each type of dilution. We presented the differences between the types of dilution an explained the process of calculating the combined measurement uncertainty. In the experimental part, we determined the repeatability of filling volumetric instruments (flasks, volumetric pipettes, and piston pipettes) by weighing. Based on the experimental results, we calculated the combined measurement uncertainties of the dilution factor for both cases of dilution. We found that the value of measurement uncertainty of the dilution factor when diluting solution to volume for an individual volumetric flask decreases with increasing volume of the pipette, while when diluting solution with volume it increases with increasing volume of the pipette addition. The greatest influence on the measurement uncertainty was due to repeatability of filling, where there were also minor deviations. We must be careful to fill as repeatably as possible, use clean and uncontaminated instruments and work under constant conditions (temperature, pressure) to obtain results in a certain range, as all these components affect the measurement uncertainty. merilna negotovost ponovljivost volumen faktor redčenja volumetrični pribor measurement uncertainty repeatability volume dilution factor volumetric instruments true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2022-11-29 13:15:00 2022-11-29 13:15:06 2022-12-22 11:24:06 0000-00-00 00:00:00 2022 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 21886 135072515 Tisler_Marcel_-_Merilna_negotovost_pri_redcenju_raztopine_na_volumen_ali_z_volumnom.pdf Tisler_Marcel_-_Merilna_negotovost_pri_redcenju_raztopine_na_volumen_ali_z_volumnom.pdf 1 C052D177549D067F818853DF024F3565 899454225b113786259b972220ee3e2170cbbd9e80d6a3504b05f00e0a492e31 5196c391-6fdf-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=164346 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0