TY - JOUR
T1 - Multisyringe flow injection analysis for the spectrophotometric determination of uranium (VI) with 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol
AU - Danchana, Kaewta
AU - de Souza, Cheilane T.
AU - Palacio, Edwin
AU - Cerdà, Víctor
N1 - Funding Information:
This work has been funded by the Spanish Ministry of Economy and Competitiveness (MINECO project CTQ2016-77155-R) and by FEDER . Kaewta Danchana acknowledges the financial support from the Conselleria d'Innovació, Recerca I Turisme of the Govern de les Illes Balears and of the Fons Social Europea ( FPI/1867/2016 ). The authors are also grateful to Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), to Fundação de Amparo à Pesquisa do Estado da Bahia (FAPESB) and to Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) for providing grants and fellowships and for financial support.
Funding Information:
This work has been funded by the Spanish Ministry of Economy and Competitiveness (MINECO project CTQ2016-77155-R) and by FEDER. Kaewta Danchana acknowledges the financial support from the Conselleria d'Innovaci?, Recerca I Turisme of the Govern de les Illes Balears and of the Fons Social Europea (FPI/1867/2016). The authors are also grateful to Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq), to Funda??o de Amparo ? Pesquisa do Estado da Bahia (FAPESB) and to Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) for providing grants and fellowships and for financial support.
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/11
Y1 - 2019/11
N2 - The spectrophotometric determination of uranium (VI) has been developed using 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (Br-PADAP). This reaction has been adapted to apply a multisyringe flow injection analysis (MSFIA) system with spectrophotometric detection. The ternary complex of uranium (VI)-(Br-PADAP)-F has been measured at 578 nm. The procedure was optimized using univariate method and two-level full factorial. Four variables (concentrations of Br-PADAP, CyDTA, NaF and sample volume) were regarded as factors in the extraction optimization. Results of the two-level full factorial design, showed that only two factors (concentration of Br-PADAP and CyDTA) are statistically significant. The calibration curve is linear over the range 0.3–5 mg L−1 uranium (VI) with a relative standard deviation of 4.0% (1 mg L−1 uranium (VI), n = 10). The recoveries of uranium in water samples were between 80 and 102%.
AB - The spectrophotometric determination of uranium (VI) has been developed using 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (Br-PADAP). This reaction has been adapted to apply a multisyringe flow injection analysis (MSFIA) system with spectrophotometric detection. The ternary complex of uranium (VI)-(Br-PADAP)-F has been measured at 578 nm. The procedure was optimized using univariate method and two-level full factorial. Four variables (concentrations of Br-PADAP, CyDTA, NaF and sample volume) were regarded as factors in the extraction optimization. Results of the two-level full factorial design, showed that only two factors (concentration of Br-PADAP and CyDTA) are statistically significant. The calibration curve is linear over the range 0.3–5 mg L−1 uranium (VI) with a relative standard deviation of 4.0% (1 mg L−1 uranium (VI), n = 10). The recoveries of uranium in water samples were between 80 and 102%.
KW - Automation
KW - Br-PADAD
KW - Multisyringe flow injection analysis
KW - Uranium
UR - http://www.scopus.com/inward/record.url?scp=85070216731&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85070216731&partnerID=8YFLogxK
U2 - 10.1016/j.microc.2019.104148
DO - 10.1016/j.microc.2019.104148
M3 - Article
AN - SCOPUS:85070216731
VL - 150
JO - Microchemical Journal
JF - Microchemical Journal
SN - 0026-265X
M1 - 104148
ER -