Cloud-point extraction,preconcentration, and spectrophotometric determination of palladium in water samples |
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| Authors: | Farzaneh Shemirani Reyhaneh Rahnama Kozani Mohammad Reza Jamali Yaghoub Assadi Mohammad-Reza Milani Hosseini |
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| Affiliation: | 1. School of Chemistry, University College of Science , University of Tehran , Tehran, Iran shemiran@khayam.ut.ac.ir;3. School of Chemistry, University College of Science , University of Tehran , Tehran, Iran;4. Department of Analytical Chemistry, Faculty of Chemistry , Iran University of Science and Technology , Tehran, Iran |
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| Abstract: | The possibility of using Thio-Michler's Ketone (TMK), 4,4′-bis(dimethylamino) thiobenzophenone, for palladium(II) concentrated by micellar extraction at the cloud-point temperature, and later spectrophotometric determination, was investigated. Under the optimum conditions, preconcentration of 50?mL of water samples in the presence of 0.1% (w/v) octylphenoxy polyethoxy ethanol (Triton X-114), 2?×?10?6?mol?L?1?TMK and 1?×?10–3?mol?L?1 buffer solution (pH?=?3.0) gave the limit of detection of 0.47?ng?mL?1, and the calibration graph was linear in the range of 2–50?ng?mL–1. The recovery under optimum working conditions was higher than 97%. The proposed method has been applied to the spectrophotometric determination of palladium(II) in natural water samples after cloud-point extraction with satisfactory results. |
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| Keywords: | Micellar extraction Spectrophotometric determination Natural water samples Palladium |
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