This paper describes an electroanalytical methodology using square-wave
adsorptive voltammetry, which has been successfully applied for the
direct determination of dexamethasone residues in raw natural waters
used for the public supply of the Ceara State, Brazil. The obtained
detection limits ranged from 7.47 x 10(-9) to 1.80 x 10(-8) mol L-1 for
the three matrices of raw natural waters evaluated. High percentages of
average recovery (98.86% +/- 0.72), repeatability (0.32% +/- 0.05) and
reproducibility (0.91% +/- 0.20) were obtained in these samples,
reaffirming the sensitivity of the procedure. Energy of the LUMO
orbitals and Mulliken's atomic charges were calculated using the
functional BLYP/DNP. The theoretical results allied to the diagnostic
criteria of the square-wave voltammetry indicate that the dexamethasone
redox mechanism is associated to the quasi-reversible and irreversible
reduction process of the ketone groups located at C-20 and C-3,
respectively.
%0 Journal Article
%1 WOS:000300061300017
%A Oliveira, Thiago M B F
%A Ribeiro, Francisco W P
%A do Nascimento, Jefferson M
%A Soares, Janete E S
%A Freire, Valder N
%A Becker, Helena
%A de Lima-Neto, Pedro
%A Correia, Adriana N
%C CAIXA POSTAL 26037, 05599-970 SAO PAULO, BRAZIL
%D 2012
%I SOC BRASILEIRA QUIMICA
%J JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
%K adsorptive analysis; direct natural raw square-wave voltammetry} waters; {dexamethasone;
%N 1
%P 110-119
%R 10.1590/S0103-50532012000100016
%T Direct Electrochemical Analysis of Dexamethasone Endocrine Disruptor in
Raw Natural Waters
%V 23
%X This paper describes an electroanalytical methodology using square-wave
adsorptive voltammetry, which has been successfully applied for the
direct determination of dexamethasone residues in raw natural waters
used for the public supply of the Ceara State, Brazil. The obtained
detection limits ranged from 7.47 x 10(-9) to 1.80 x 10(-8) mol L-1 for
the three matrices of raw natural waters evaluated. High percentages of
average recovery (98.86% +/- 0.72), repeatability (0.32% +/- 0.05) and
reproducibility (0.91% +/- 0.20) were obtained in these samples,
reaffirming the sensitivity of the procedure. Energy of the LUMO
orbitals and Mulliken's atomic charges were calculated using the
functional BLYP/DNP. The theoretical results allied to the diagnostic
criteria of the square-wave voltammetry indicate that the dexamethasone
redox mechanism is associated to the quasi-reversible and irreversible
reduction process of the ketone groups located at C-20 and C-3,
respectively.
@article{WOS:000300061300017,
abstract = {This paper describes an electroanalytical methodology using square-wave
adsorptive voltammetry, which has been successfully applied for the
direct determination of dexamethasone residues in raw natural waters
used for the public supply of the Ceara State, Brazil. The obtained
detection limits ranged from 7.47 x 10(-9) to 1.80 x 10(-8) mol L-1 for
the three matrices of raw natural waters evaluated. High percentages of
average recovery (98.86% +/- 0.72), repeatability (0.32% +/- 0.05) and
reproducibility (0.91% +/- 0.20) were obtained in these samples,
reaffirming the sensitivity of the procedure. Energy of the LUMO
orbitals and Mulliken's atomic charges were calculated using the
functional BLYP/DNP. The theoretical results allied to the diagnostic
criteria of the square-wave voltammetry indicate that the dexamethasone
redox mechanism is associated to the quasi-reversible and irreversible
reduction process of the ketone groups located at C-20 and C-3,
respectively.},
added-at = {2022-05-23T20:00:14.000+0200},
address = {CAIXA POSTAL 26037, 05599-970 SAO PAULO, BRAZIL},
author = {Oliveira, Thiago M B F and Ribeiro, Francisco W P and do Nascimento, Jefferson M and Soares, Janete E S and Freire, Valder N and Becker, Helena and de Lima-Neto, Pedro and Correia, Adriana N},
biburl = {https://www.bibsonomy.org/bibtex/25574dd13da17d00a55c30bb49f487848/ppgfis_ufc_br},
doi = {10.1590/S0103-50532012000100016},
interhash = {7411f1498cacc2662abfa321c5030737},
intrahash = {5574dd13da17d00a55c30bb49f487848},
issn = {0103-5053},
journal = {JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY},
keywords = {adsorptive analysis; direct natural raw square-wave voltammetry} waters; {dexamethasone;},
number = 1,
pages = {110-119},
publisher = {SOC BRASILEIRA QUIMICA},
pubstate = {published},
timestamp = {2022-05-23T20:00:14.000+0200},
title = {Direct Electrochemical Analysis of Dexamethasone Endocrine Disruptor in
Raw Natural Waters},
tppubtype = {article},
volume = 23,
year = 2012
}