A new room temperature ionic liquid 1-butyl-3-trimethylsilylimidazolium hexafluorophosphate as a solvent for extraction and preconcentration of mercury with determination by cold vapor atomic absorption spectrometry

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ID: 1261
2007
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Abstract
A new room temperature ionic liquid 1-butyl-3-trimethylsilylimidazolium hexafluorophosphate abbreviated as [C4tmsim][PF6] was synthesized and developed as a novel medium for liquid/liquid extraction of inorganic mercury in this work. Under optimal condition, o-carboxyphenyldiazoamino-p-azobenzene abbreviated as CDAA reacted with inorganic mercury to form a neutral Hg–CDAA complex, the complex was rapidly extracted into ionic liquid phase. After back-extracting into aqueous phase with sulfide sodium solution, the mercury concentration was detected by cold vapor atomic absorption spectrometry. The extraction and back-extraction efficiencies were 99.9 and 100.1% for 5.0ÎŒgL−1 standard mercury in 1000mL of water solution, respectively. The detection limit, calculated using three times the standard error of estimate of the calibration graph, is 0.01ng of mercury per milliliter water sample. The proposed method has been used to the determination of trace inorganic mercury in natural water with satisfactory results. Moreover, Zeta potential and surface tension of [C4tmsim][PF6] solution were measured and applied to explain the extraction mechanism of [C4tmsim][PF6] system.
Reference Key
zaijun2007a Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Zaijun Li;Qin Wei;Rui Yuan;Xia Zhou;Huizhen Liu;Haixia Shan;Qijun Song
Journal Talanta
Year 2007
DOI
https://doi.org/10.1016/j.talanta.2006.03.023
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