title: Preparation of Al2O3/TiO2 composite sol-gel fiber for headspace solid-phase microextraction of chlorinated organic solvents from urine.
abstract: A new solid-phase microextraction fiber based on alumina/titania sol-gel-coated on copper wire for headspace sampling of chlorinated organic solvents (chloroform, carbon tetrachloride, trichloroethene, and tetrachloroethene) from urine samples is introduced. The influences of fiber coating composition and microextraction conditions (extraction temperature, extraction time, and ionic strength of the sample matrix) on the fiber performance were investigated. Also, the influence of temperature and time on desorption of analytes from fiber was studied. The proposed fiber has high capacity and demonstrates fast sampling of chlorinated organic solvents from urine samples with high sensitivity. The relative standard deviation (RSD, n=5) for all analytes was below 6.5%.
authors.affiliation: Department of Chemistry, Faculty of Science, Urmia University, Urmia, Iran. khalil.farhadi@yahoo.com
authors.forename: Khalil
authors.initials: K
authors.lastname: Farhadi
authors.forename: Ramin
authors.initials: R
authors.lastname: Maleki
authors.forename: Raheleh
authors.initials: R
authors.lastname: Tahmasebi
mesh_terms: D000327:Adsorption; D000537:Aluminum Oxide / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry*; D006801:Humans; D006843:Hydrocarbons, Chlorinated / Q000302:isolation & purification* / Q000652:urine*; D052617:Solid Phase Microextraction / Q000295:instrumentation / Q000379:methods*; D014025:Titanium / Q000737:chemistry*
chemical_list: D003188:Composite Resins; D006843:Hydrocarbons, Chlorinated; C009495:titanium dioxide; D014025:Titanium; D000537:Aluminum Oxide