Documents disponibles écrits par cet auteur

A simple spectrophotometric method for determination of gold (III) in aqueous samples / Yousef Fazli in Minerals engineering, Vol. 22 N° 2 (Janvier 2009) 

Public ISBD [article]  in Minerals engineering > Vol. 22 N° 2 (Janvier 2009) . - pp. 210–212 Titre : A simple spectrophotometric method for determination of gold (III) in aqueous samples Type de document : texte imprimé Auteurs : Yousef Fazli, Auteur ; Jalal Hassan, Auteur ; Mohamad-Hadi Karbasi, Auteur Année de publication : 2009 Article en page(s) : pp. 210–212 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Gold  UV–vis  TMBH  Water Index. décimale : 622 Industrie minière Résumé : A simple method for rapid determination of trace Au in natural water was presented by using UV–vis spectrophotometry after reaction of gold (III) with 3,3′, 5,5′-tetramethylbenzidine hydrochloride (TMBH) in acidic solution. Under the optimum conditions, in a concentration range of 100–2000 μg L−1 of Au (III) a good linear calibration graph was obtained (r = 0.9969, n = 7). The percent relative standard deviation (RSD) for determination of 1000 μg L−1 Au was 10% (n = 3) and limit of detection based on a signal-to-noise ratio (S/N) of 3 (3Sbl) was 50 μg L−1. The proposed method has been successfully applied to the determination of gold spiked and real aqueous samples. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687508001453 [article] A simple spectrophotometric method for determination of gold (III) in aqueous samples [texte imprimé] / Yousef Fazli, Auteur ; Jalal Hassan, Auteur ; Mohamad-Hadi Karbasi, Auteur . - 2009 . - pp. 210–212. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 22 N° 2 (Janvier 2009) . - pp. 210–212 Mots-clés : Gold  UV–vis  TMBH  Water Index. décimale : 622 Industrie minière Résumé : A simple method for rapid determination of trace Au in natural water was presented by using UV–vis spectrophotometry after reaction of gold (III) with 3,3′, 5,5′-tetramethylbenzidine hydrochloride (TMBH) in acidic solution. Under the optimum conditions, in a concentration range of 100–2000 μg L−1 of Au (III) a good linear calibration graph was obtained (r = 0.9969, n = 7). The percent relative standard deviation (RSD) for determination of 1000 μg L−1 Au was 10% (n = 3) and limit of detection based on a signal-to-noise ratio (S/N) of 3 (3Sbl) was 50 μg L−1. The proposed method has been successfully applied to the determination of gold spiked and real aqueous samples. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687508001453