diplomsko delo
Natalija Žnidar (Author), Darinka Brodnjak-Vončina (Mentor), Darinka Štajnbaher (Co-mentor)

Abstract

Namen diplomske naloge je določiti koncentracije policikličnih aromatskih ogljikovodikov v vzorcih zemlje. Za določitev policikličnih aromatskih ogljikovodikov v zemlji smo uporabili metodo plinske kromatografije z masno selektivnim detektorjem (GC/MSD) in metodo izbranih ionov (SIM – selected ion monitoring). Za kvantitativno določitev v GC/MSD smo uporabili interne standarde acenaften – d10, fenantren – d10 in krizen – d12. Postopek priprave vzorca je bil ekstrakcija trdno – tekoče z mešanico topil n-heksana in diklorometana. Za čiščenje ekstraktov smo uporabili kolono napolnjeno s silikagelom in aluminijevim oksidom. Rezultate vsebnosti policikličnih aromatskih ogljikovodikov smo statistično ovrednotili glede na zahteve validacijskega postopka (linearnost, ponovljivost, točnost, meja določljivosti, meja zaznavnosti, selektivnost in sistem zagotavljanja kakovosti). Ugotovili smo prisotnost vpliva matrice. Rezultati so pokazali, da je analizna metoda uporabna za določanje policikličnih aromatskih ogljikovodikov v zemlji, saj so bili izkoristki vseh policikličnih aromatskih ogljikovodikov z izjemo naftalena ponovljivi in znotraj predpisanega kriterija.

Keywords

policiklični aromatski ogljikovodiki;plinska kromatografija z masno selektivnim detektorjem;validacija analizne metode;zemlja;

Data

Language: Slovenian
Year of publishing:
Source: Maribor
Typology: 2.11 - Undergraduate Thesis
Organization: UM FKKT - Faculty of Chemistry and Chemical Engineering
Publisher: [N. Žnidar]
UDC: 547.6:543.544.3(043.2)
COBISS: 15151638 Link will open in a new window
Views: 3082
Downloads: 397
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Other data

Secondary language: English
Secondary title: Determination of polycyclic aromatic hydrocarbons in soil
Secondary abstract: The aim of diploma thesis is to determine concentration of polycyclic aromatic hydrocarbons (PAH) in soil samples. For PAHs determination in soil samples gas chromatography with mass spectrometry (GC/MS) was used. Acenaphtene – d10, phenantrene – d10 and chrysene – d12 were used as internal standards for quantitation purposes. Analytical procedure is based on solid – liquid extraction using solvent mixture n-hexane and dichloromethane. The extracts were cleaned-up using silica/Al2O3 column. Results were statistically evaluated according to validation requirements (linearity, repeatability, accuracy, limit of quantitation, limit of detection, selectivity and according to quality assurance plan). We found the presence of matrix effect. The results show that the analytical method for the determination of PAHs in soil matrix is accurate and reliable, because the recoveries for all PAHs with the exception of naphtalene are reproducible and within permitted limits.
Secondary keywords: polycyclic aromatic hydrocarbons;gas chromatography with mass spectrometry;validation of analytical method;soil;
URN: URN:SI:UM:
Type (COBISS): Undergraduate thesis
Thesis comment: Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo
Pages: IX, 51 f.
Keywords (UDC): mathematics;natural sciences;naravoslovne vede;matematika;chemistry;crystallography;mineralogy;kemija;organic chemistry;organska kemija;mathematics;natural sciences;naravoslovne vede;matematika;chemistry;crystallography;mineralogy;kemija;analytical chemistry;analizna kemija;physicochemical methods of analysis (other than optical methods);
ID: 1013797