20.500.12556/DKUM-10913 DOLOČANJE NITRITOV V VODAH S KONSTANTNO PRETOČNIM ANALIZATORJEM DETERMINATION OF NITRITE IN WATERS BY CONTINUOUS FLOW ANALYSER Za določitev nitritov v različnih vzorcih vod (pitnih, podzemnih, površinskih in odpadnih vod) smo uporabili konstantno pretočno analizo. Postopek temelji na izmerjeni absorbanci. Za pripravo osnovne standardne raztopine smo uporabili trden natrijev nitrit. Rezultate vzorcev smo ovrednotili s pomočjo umeritvene krivulje. Statistično ovrednotenje smo izvedli glede na zahteve analizne metode (koncentracijsko območje, meja določanja, meje zaznavanja, ponovljvost, obnovljivost in pravilnost). S sodelovanjem v medlaboratorijskih primerjavah smo dokazali, da je analizna metoda pravilna. Rezultate smo ovrednotili glede na dovoljene mejne vrednosti nitritov v pitnih, podzemnih in odpadnih vodah v Sloveniji. Iz rezultatov vidimo, da je vsebnost nitritov v večini analiziranih vzorciev vod nizka, saj ne presega mejnih normativov. For determination of nitrite in different water samples like drinking, ground and waste waters the Continuous Flow Analysis (CFA) is used. The analytical procedure is based on measuring absorbance. Stock standard solutions are prepared from sodium nitrite salt. Results of nitrite content in different water samples were evaluated using calibration curve. Statistical evaluation was performed according to the demands of the analytical method (working range, linearity, limit of quantitation LOQ, limit of detection LOD, repeatability, reproducibility and accuracy). Accuracy of the analytical method has been proven by the participation in the proficiency tests (PT-test). The obtained results were also evaluated according to the permitted concentration of nitrite in drinking, ground and waste waters in Slovenia. It was established that the concentration of nitrite was below the permitted limit in majority of analysed waters. konstantno pretočni analizator nitrit pitne vode površinske vode podzemne vode odpadne vode validacija Continuous Flow Analysis (CFA) nitrite drinking waters ground waters waste waters validation true true false [B. Lasecky] Slovenski jezik Angleški jezik Diplomsko delo 2009-06-15 11:14:31 2009-12-22 09:45:02 2022-04-11 16:40:21 2022-04-17 03:19:18 2009 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 628.3:543(043.2) 13339158 URN:SI:UM:DK:2ZUR8Q5G VS_Lasecky_Barbara_2009.pdf VS_Lasecky_Barbara_2009.pdf 1 4E4DC0284716395C64B7F3CD8C91692E 6bf739e803bd41bf2346c381daebf2b65c481cc30e63d4500179c0fb49916e27 f6960212-7c02-11eb-bb7a-00155d0001ca 20.500.12556/dkum/b5523a26-8974-4c2b-8a3c-70fffc2530ae https://dk.um.si/Dokument.php?lang=slv&id=9307 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0