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dc.contributor.authorTeixeira, Leonardo Sena Gomes-
dc.contributor.authorCosta, Antonio Celso Spinola-
dc.contributor.authorFerreira, Sergio Luis Costa-
dc.contributor.authorFreitas, Maria de Lourdes-
dc.contributor.authorCarvalho, Marcelo Souza de-
dc.creatorTeixeira, Leonardo Sena Gomes-
dc.creatorCosta, Antonio Celso Spinola-
dc.creatorFerreira, Sergio Luis Costa-
dc.creatorFreitas, Maria de Lourdes-
dc.creatorCarvalho, Marcelo Souza de-
dc.descriptionp. 519-522pt_BR
dc.description.abstractA sensitive and selective spectrophotometric method is proposed for the rapid determination of uranium using 2-(2- Thiazolylazo)-p-Cresol (TAC). The reaction between TAC and uranium (VI) is instantaneous at pH 6.5 and the absorbance remains stable for over 3 h. N-cetyl-N,N,N-trimethylamonium bromide (CTAB) and triton X-100 are used for increasing the sensitivity and solubility of the system respectively. The method allows the determination of uranium in the range from 0.30 to 12.0 mg mL-1 with a molar absorptivity of 1.31 x 104 L mol-1 cm-1 and features a detection limit of 26 ng mL-1 at 588 nm. The selectivity of the reagent was improved by the use of (1,2-cyclohexylenedinitrilo) tetraacetic acid (CyDTA) as masking agent. The proposed method has been successfully applied to the determination of uranium in mine drainage waters. The precision (R.S.D. < 2%) and the accuracy obtained were satisfactory.pt_BR
dc.publisherJournal of the Brazilian Chemical Societypt_BR
dc.subjecturanium determinationpt_BR
dc.titleSpectrophotometric Determination of Uranium Using 2-(2-Thiazolylazo)-p-Cresol (TAC) in the Presence of Surfactantspt_BR
dc.title.alternativeJournal of the Brazilian Chemical Societypt_BR
dc.typeArtigo de Periódicopt_BR
dc.description.localpubSão Paulopt_BR
dc.identifier.numberv. 10, n. 6pt_BR
Appears in Collections:Artigo Publicado em Periódico (Química)

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