PMID- 27305647
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20180109
LR  - 20180109
IS  - 1873-3557 (Electronic)
IS  - 1386-1425 (Linking)
VI  - 168
DP  - 2016 Nov 5
TI  - A new spectrophotometric method for determination of EDTA in water using its 
      complex with Mn(III).
PG  - 253-257
LID - S1386-1425(16)30326-2 [pii]
LID - 10.1016/j.saa.2016.06.011 [doi]
AB  - EDTA is an important ligand used in many industrial products as well as in 
      agriculture, where it is employed to assist in phytoextraction procedures and the 
      absorption of nutrients by plants. Due to its intensive use and recalcitrance, it 
      is now considered an emerging pollutant in water, so there is great interest in 
      techniques suitable for its monitoring. This work proposes a method based on 
      formation of the Mn(III)-EDTA complex after oxidation of the Mn(II)-EDTA complex 
      by PbO2 immobilized on cyanoacrylate spheres. A design of experiments (DOE) based 
      on the Doehlert matrix was used to determine the optimum conditions of the 
      method, and the influence of the variables was evaluated using a multiple linear 
      regression (MLR) model. The optimized method presented a linear response in the 
      range from 0.77 to 100.0mumolL(-1), with analytical sensitivity of 
      7.7x10(3)Lmol(-1), a coefficient of determination of 0.999, and a limit of 
      detection of 0.23mumolL(-1). The method was applied using samples fortified at 
      different concentration levels, and the recoveries achieved were between 97.0 and 
      104.9%.
CI  - Copyright (c) 2016 Elsevier B.V. All rights reserved.
FAU - Andrade, Carlos Eduardo O
AU  - Andrade CEO
AD  - Departamento de Quimica, Universidade Federal de Vicosa, Vicosa, MG, Brazil; 
      Centro Federal de Educacao Tecnologica de Minas Gerais (CEFET-MG), campus 
      Timoteo, Timoteo, MG, Brazil.
FAU - Oliveira, Andre F
AU  - Oliveira AF
AD  - Departamento de Quimica, Universidade Federal de Vicosa, Vicosa, MG, Brazil. 
      Electronic address: andref.oliveira@ufv.br.
FAU - Neves, Antonio A
AU  - Neves AA
AD  - Departamento de Quimica, Universidade Federal de Vicosa, Vicosa, MG, Brazil.
FAU - Queiroz, Maria Eliana L R
AU  - Queiroz MELR
AD  - Departamento de Quimica, Universidade Federal de Vicosa, Vicosa, MG, Brazil.
LA  - eng
PT  - Journal Article
DEP - 20160606
PL  - England
TA  - Spectrochim Acta A Mol Biomol Spectrosc
JT  - Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy
JID - 9602533
OTO - NOTNLM
OT  - Doehlert matrix
OT  - EDTA determination
OT  - Immobilized PbO(2)
OT  - Mn(III) complexes
EDAT- 2016/06/16 06:00
MHDA- 2016/06/16 06:01
CRDT- 2016/06/16 06:00
PHST- 2016/03/01 00:00 [received]
PHST- 2016/05/14 00:00 [revised]
PHST- 2016/06/04 00:00 [accepted]
PHST- 2016/06/16 06:00 [entrez]
PHST- 2016/06/16 06:00 [pubmed]
PHST- 2016/06/16 06:01 [medline]
AID - S1386-1425(16)30326-2 [pii]
AID - 10.1016/j.saa.2016.06.011 [doi]
PST - ppublish
SO  - Spectrochim Acta A Mol Biomol Spectrosc. 2016 Nov 5;168:253-257. doi: 
      10.1016/j.saa.2016.06.011. Epub 2016 Jun 6.