Avtor/Urednik		Šlejkovec, Z; Salma, I; van Elteren, JT; Zemplen-Papp, E
Naslov		Speciation of arsenic in coarse and fine urban aerosols using sequential extraction combined with liquid chromatography and atomic fluorescence detection
Tip		članek
Vir		Fresen J Anal Chem
Vol. in št.		Letnik 366
Leto izdaje		2000
Obseg		str. 830-4
Jezik		eng
Abstrakt		An analytical procedure for speciation of As in urban aerosol samples was developed. The aerosols were collected by sequential filtration through membrane filters. Part of each filter was investigated by INAA for the total amount of As. Another part of the filters was treated by a sequential extraction procedure to differentiate between water-extractable, phosphate-extractable and refractory chemical forms. Water-extractable forms were further differentiated into anionic As species by HPLC-HGAFS. Extractability of As into water exhibited a clear dependency on the aerosol size fraction (12% in coarse fraction and 50% in fme fraction). Dependency of the phosphate extractable As on the aerosol size fraction seems not to be significant (10-15% in both size fractions). The remaining amount, i.e., about 78% of the coarse As and about 40% of the fine As was considered to be refractory or environmentally immobile As. Water-extractable As forms could only be attributed to arsenate.
Deskriptorji		ARSENIC AIR POLLUTANTS, ENVIRONMENTAL AEROSOLS NEUTRON ACTIVATION ANALYSIS CHROMATOGRAPHY, LIQUID SPECTROMETRY, FLUORESCENCE HUNGARY