Ionic liquid-based dispersive liquid–liquid microextraction and enhanced spectrophotometric determination of molybdenum (VI) in water and plant leaves samples by FO-LADS

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• 作者：Maysam Gharehbaghi^a ; Farzaneh Shemirani ; ^a ; ^{shemiran@khayam.ut.ac.ir}
• 关键词：Ionic liquid ; Dispersive liquid– ; liquid microextraction ; Enhanced spectrophotometry ; Molybdenum ; Fiber optic-linear array detection spectrophotometry ; Plant leaves samples
• 刊名：Food and Chemical Toxicology
• 出版年：2011
• 出版时间：February 2011
• 年：2011
• 卷：49
• 期：2
• 页码：423-428
• 全文大小：328 K

文摘

A new simple and rapid ionic liquid-based dispersive liquid–liquid microextraction (IL-DLLME) has been applied to preconcentrate trace levels of molybdenum (VI) as a prior step to its enhanced determination by fiber optic-linear array detection spectrophotometry (FO-LADS). In this method, a small amount of [Hmim][Tf₂N] (1-hexyl-3-methylimmidazolium bis (trifluormethylsulfonyl) imid) as an extraction solvent was applied to extract molybdenum – pyrogallol red complex, which was formed in an aqueous solution in the presence of N-cetyl-N-N-N-trimethyl ammonium chloride as a sensitizing agent. Under optimum conditions, enhancement factor, detection limit and relative standard deviation (n = 5, for 30 μg L⁻¹ of molybdenum (VI)) in 10 mL water sample were 72.6, 1.43 μg L⁻¹ and 2.8 % , respectively.