title: Cloud point extraction-atomic absorption spectrometry for pre-concentration and determination of cadmium in cigarette samples.
abstract: A new complexing agent, 2-((2-((1H-benzo[d]imidazole-2yl)methoxy)phenoxy)methyl)-1H-benzo[d]imidazole (BIMPI), was used in cloud point extraction and applied for selective pre-concentration of trace amounts of cadmium in cigarette samples. Cadmium was complexed with BIMPI in a buffer solution (pH = 10) using Triton X-114 as surfactant and quantitatively extracted into a small volume of the surfactant-rich phase after centrifugation. Under optimized conditions (pH = 10.0, 0.8 × 10(-4) mol L(-1) BIMPI and 0.08 % (w/v) Triton X-114), calibration graph was linear in the range of 34.0-1,670.0 μg L(-1). The proposed method was applied to the determination of Cd in various cigarette (tobacco) samples which gave satisfactory results.
authors.affiliation: Department of Chemistry, Payame Noor University, PO Box: 19395-4697 Tehran, Iran. tavallali@yahoo.com
authors.forename: Hossein
authors.initials: H
authors.lastname: Tavallali
authors.forename: Fazlollah
authors.initials: F
authors.lastname: Boustani
authors.forename: Mozhdeh
authors.initials: M
authors.lastname: Yazdandoust
authors.forename: Mehdi
authors.initials: M
authors.lastname: Aalaei
authors.forename: Mahboobeh
authors.initials: M
authors.lastname: Tabandeh
mesh_terms: D002104:Cadmium / Q000032:analysis*; D005591:Chemical Fractionation / Q000379:methods; D015386:Hazardous Substances / Q000032:analysis*; D013054:Spectrophotometry, Atomic / Q000379:methods; D062789:Tobacco Products / Q000032:analysis* / Q000706:statistics & numerical data
chemical_list: D015386:Hazardous Substances; D002104:Cadmium