Ionic liquid-based modified cold-induced aggregation microextraction (M-CIAME) as a novel solvent extraction method for determination of gold in saline solutions / Shokouh Mahpishanian in Minerals engineering, Vol. 23 N° 10 (Septembre 2010)  

Public ISBD [article]  inMinerals engineering > Vol. 23 N° 10 (Septembre 2010) . - pp. 823–825 Titre : Ionic liquid-based modified cold-induced aggregation microextraction (M-CIAME) as a novel solvent extraction method for determination of gold in saline solutions Type de document : texte imprimé Auteurs : Shokouh Mahpishanian, Auteur ; Farzaneh Shemirani, Auteur Année de publication : 2011 Article en page(s) : pp. 823–825 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Solvent extraction Gold Environmental samples Résumé : 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. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687510001433 [article] Ionic liquid-based modified cold-induced aggregation microextraction (M-CIAME) as a novel solvent extraction method for determination of gold in saline solutions [texte imprimé] / Shokouh Mahpishanian, Auteur ; Farzaneh Shemirani, Auteur . - 2011 . - pp. 823–825. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 23 N° 10 (Septembre 2010) . - pp. 823–825 Mots-clés : Solvent extraction Gold Environmental samples Résumé : 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. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687510001433

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