Multivariate Optimization of a Simultaneous Cloud Point Extraction Procedure of Cd, Cu and Ni from Sediments Samples and Determination by ICP OES
A simultaneous preconcentration method for cadmium, copper and nickel in samples of sediments and determination by inductively coupled plasma optical emission spectrometry was developed. The method is based on the extraction of the metals as complexes formed with 2-(5-bromo-2-pyridylazo)-5-(diethylamino)-phenol (5-Br-PADAP) at cloud point of the nonionic surfactant polyethylene glycol tert-octylphenyl ether (triton X-114). Optimization was performed using a Doehlert design and constrained mixture design. Desirability function was used to provide a simultaneous optimization of the evaluated responses. The developed method presented limits of quantification of 0.066, 0.149 and 0.191 µg g-1 and an enrichment factor of 18.4, 16.8 and 18.2 fold for cadmium, copper and nickel, respectively. The proposed method was applied in sediment samples collected in the urban stretch of the Contas River (Jequié, BA, Brazil). Adequate accuracy was found by analysis of two certified reference materials (NIST 1646a estuarine sediments and NIST 2702 marine sediment).
Main Authors: | Santos,Leandro dos, Santos,Queila O. dos, Moreno,Islania, Novaes,Cléber G., Santos,Márcio J. S. dos, Bezerra,Marcos A. |
---|---|
Format: | Digital revista |
Language: | English |
Published: |
Sociedade Brasileira de Química
2016
|
Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532016000400745 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Similar Items
-
The use of cloud point extraction and hydride generation for improving the Sb and Se limits of detection in ICP OES
by: Depoi,Fernanda dos Santos, et al.
Published: (2012) -
Simultaneous determination of Pb and Cd in seafood by ICP OES with on-line pre-concentration by solid phase extraction with amberlite XAD-4 after complex formation with DDTP
by: Santos,Éder José dos, et al.
Published: (2013) -
FI-HG-ICP OES system for simultaneous determination of As, Sb and Se.
by: CRISPINO, C. C., et al.
Published: (2005-02-15) -
Determination of trace metals in electrolytic copper by ICP OES and ICP-MS
by: Santos,Éder José dos, et al.
Published: (2005) -
Multivariate analysis of ICP OES calibration conditions for sequential extraction of metals ions.
by: NOGUEIRA, A. R. de A., et al.
Published: (2009-11-13)