Determination of the atmospheric deposition of polycyclic aromatic hydrocarbons and polychlorinated biphenyls (CROSBI ID 675076)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | domaća recenzija
Podaci o odgovornosti
Šimić, Iva ; Mendaš Starčević, Gordana ; Pehnec, Gordana
engleski
Determination of the atmospheric deposition of polycyclic aromatic hydrocarbons and polychlorinated biphenyls
Atmospheric deposition represents an important removal mechanism from the atmosphere to the aquatic and terrestrial systems, and therefore is of great environmental concern. The presence of polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) in bulk atmospheric deposition (wet and dry) represents a significant portion of waterbody contamination. The PAHs have gained much attention due to their mutagenic and carcinogenic potentials and have therefore been included in the European Union and United States Environmental Protection Agency (EPA) priority pollutant list. PCBs are widespread, highly persistent chemicals with harmful effects on the ecosystem and human health. They are prone to long‐range transport by circulation of air masses, deposition on particles to which they are sorbed and wet and dry deposition washing them out from the atmosphere. The aim of this study was at developing and validating a method for the extraction and determination of 12 PAHs (fluoranthene, pyrene, benz(a)anthracene, chrysene, benzo(b)fluoranthene, benzo(k)fluoranthene, benzo(j)fluoranthene, benzo(a)pyrene, benzo(e)pyrene, indeno(1, 2, 3‐ cd)pyrene, dibenz(a, h)anthracene and benzo(g, h, i)perylene)and 6 indicator PCBs congeners (PCB‐28, PCB‐52, PCB‐101, PCB‐138, PCB‐153 and PCB‐180) in deposition samples. The sample preparation was optimized for final analysis by gas chromatography (GC) with electron capture detector (ECD) (for PCBs) and mass spectrometric (MS) detection (for PAHs). Different solid‐phase extraction procedures were investigated and compared by analysing a model deposition sample. The fortified samples with surrogate standard (perylene‐d12), PAHs and PCBs in mass concentrations of 0.05 ng ml– 1, were forced through a silica solid phase extraction cartridge. To achieve the best extraction procedure efficiency, the elution of retained compounds with different solvents was investigated. The best results were by elution with solvent mixture dichloromethane : n‐hexane (1:1, v/v). The eluate was dried with anhydrous sodium sulphate, reduced to 2 mL under nitrogen and then analysed by GC‐MS/MS and GC‐ECD. The mass concentrations of PAHs were determined by internal standard method. The extraction recoveries for PCBs and PAHs were higher than 80% except for BeP, while the recovery of surrogate standard was higher than 50%. The detection limits obtained for PCBs and PAHs were from 0.07 ng m–2d–1 to 0.33 ng m–2d–1 and from 0.27 ng m–2d–1 to 1.44 ng m–2d–1, respectively. The method was successfully applied to determine 12 PAHs and 6 PCBs in the bulk atmospheric deposition sampled from an urban background station in Zagreb.
PAHs ; PCBs ; solid‐phase extraction
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Podaci o prilogu
230-230.
2019.
nije evidentirano
objavljeno
978-953-6894-67-3
Podaci o matičnoj publikaciji
26. hrvatski skup kemičara i kemijskih inženjera
Galić, Nives ; Rogošić, Marko
Zagreb: Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI)
Podaci o skupu
26. hrvatski skup kemičara i kemijskih inženjera (26HSKIKI) ; 4. simpozij Vladimir Prelog
poster
09.04.2019-12.04.2019
Šibenik, Hrvatska