Author/Editor		Šlejkovec, Z; Salma, I; van Elteren, JT; Zemplen-Papp, E
Title		Speciation of arsenic in coarse and fine urban aerosols using sequential extraction combined with liquid chromatography and atomic fluorescence detection
Type		članek
Source		Fresen J Anal Chem
Vol. and No.		Letnik 366
Publication year		2000
Volume		str. 830-4
Language		eng
Abstract		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.
Descriptors		ARSENIC AIR POLLUTANTS, ENVIRONMENTAL AEROSOLS NEUTRON ACTIVATION ANALYSIS CHROMATOGRAPHY, LIQUID SPECTROMETRY, FLUORESCENCE HUNGARY