Določanje nitritov v vodah s konstantno pretočnim analizatorjem

diplomska naloga

Barbara Lasecky (Author), Darinka Brodnjak-Vončina (Mentor), Marjana Babič (Co-mentor)

Abstract

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.

Keywords

konstantno pretočni analizator;nitrit;pitne vode;površinske vode;podzemne vode;odpadne vode;validacija;

Data

Language:	Slovenian
Year of publishing:	2009
Source:	Maribor
Typology:	2.11 - Undergraduate Thesis
Organization:	UM FKKT - Faculty of Chemistry and Chemical Engineering
Publisher:	[B. Lasecky]
UDC:	628.3:543(043.2)
COBISS:	13339158
Views:	2299
Downloads:	225
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Determination of nitrite in waters by continuous flow analysis
Secondary abstract:	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.
Secondary keywords:	continuous flow analysis (CFA);nitrite;drinking waters;waste waters;validation;
URN:	URN:SI:UM:
Type (COBISS):	Undergraduate thesis
Thesis comment:	Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo
Pages:	XII, 56 f., [12] f. pril.
Keywords (UDC):	applied sciences;medicine;technology;uporabne znanosti;medicina;tehnika;engineering;technology in general;inženirstvo;tehnologija na splošno;public health engineering;water;sanitation;illuminating engineering;sanitarna tehnika;zdravstvena tehnika;voda;sanitarne naprave;svetlobna tehnika;sewage;treatment;disposal;utilization of sewage;odpadne vode;mathematics;natural sciences;naravoslovne vede;matematika;chemistry;crystallography;mineralogy;kemija;analytical chemistry;analizna kemija;
ID:	986769