Ionic liquid-based modified cold-induced aggregation microextraction (M-CIAME) as a novel solvent extraction method for determination of gold in saline solutions |
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| Authors: | Shokouh Mahpishanian Farzaneh Shemirani |
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| Affiliation: | 1. Actinide Coordination Chemistry Group, Quantum Beam Science Centre, Japan Atomic Energy Agency (SPring-8), Hyogo 679-5148, Japan;2. Shaheed Ziaur Rahman Medical College, Bogra 5800, Bangladesh;3. Department of Chemistry, Faculty of Science, Suez University, Suez, Egypt;4. Department of Chemistry, Bld#5, College of Science, King Saud University, Riyadh 11451, Saudi Arabia;1. Reaction Dynamic Research Division, Japan Atomic Energy Agency (SPring-8), Hyogo 679-5148, Japan;2. Department of Chemistry, Faculty of Science, Sohag University, Sohag-82524, Egypt;3. Material Circulation Design Group, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba-shi, Ibaraki-ken 305-0047, Japan;1. Institute of Vascular Medicine, Peking University Third Hospital, Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Ministry of Health, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education and Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing 100191,China;2. Department of Chemistry, Jilin University, Changchun 130021, China;3. The Second Hospital, Jilin University, Changchun 130041, China;1. Faculty of Education, Shimane University, Matsue 690-8504, Japan;2. Interdisciplinary Graduate School of Science and Engineering, Shimane University, Matsue 690-8504, Japan;3. Department of Chemistry, School of Science, Tokai University, Hiratsuka 259-1292, Japan |
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| Abstract: | Modified-cold-induced aggregation microextraction (M-CIAME) was used for determination of gold in saline solutions. It is robust against the much higher concentration of salt (up to 40%). In this method sodium hexafluorophosphate (NaPF6) was added to the sample solution containing Au-TMK complex and a very small amount of 1-hexyl-3-methylimidazolium tetrafluoroborate Hmim]BF4]. Afterward the solution was cooled in an ice bath and a cloudy solution was formed. After centrifuging, the extractant phase was analyzed using a spectrophotometric detection method. Under the optimum conditions, the limit of detection (LOD) was 0.7 ng mL?1 and the relative standard deviation (RSD) was 1.65% for 50 ng mL?1 gold. The method was applied for the determination of trace amount of Au in mineral and seawater with satisfactory results. |
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