Fereshteh Heydari - Department of Chemistry, Faculty of Science, Arak Branch, Islamic Azad University, P.O.Box: ۳۸۱۳۵-۵۶۷, Arak, Iran
Majid Ramezani - Department of Chemistry, Faculty of Science, Arak Branch, Islamic Azad University, P.O.Box: ۳۸۱۳۵-۵۶۷, Arak, Iran
Nasim Bayat - Department of Chemistry, Faculty of Science, Arak Branch, Islamic Azad University, P.O.Box: ۳۸۱۳۵-۵۶۷, Arak, Iran
Maryam Ghalenoei - Department of Chemistry, Faculty of Science, Arak Branch, Islamic Azad University, P.O.Box: ۳۸۱۳۵-۵۶۷, Arak, Iran

  A novel switchable-hydrophilicity solvent based liquid phase microextraction (SHS-LPME) coupled with flame atomic absorption spectrometry has been applied for preconcentration and extraction of Ag(I). In this study, Triethylamine (TEA) was selected as switchable solvent. The Ag (I)-1-(2-pyridylazo)-2-naphthol complex was extracted into organic phase by converting the protonated carbonate (P-TEA-C) to TEA. The experimental conditions were optimized using Plackett–Burman and Box–Behnken design methods. Under the optimum conditions, the detection limit, relative standard deviation and the enrichment factor were 0.35 μg L-1, 1.4% and 68, respectively. The calibration graph was linear over the range 2 to 500 μg L-1 with correlation coefficient of 0.997. The proposed method was successfully applied to determine of trace silver in water samples.

Switchable-Hydrophilicity Solvent, Silver, Plackett–Burman and Box–Behnken Design, Water Samples