Polytetrafluorethylene Membrane-Based Liquid Three-Phase Micro Extraction Combined with in situ Differential Pulse Anodic Stripping Voltammetry for the Determination of Cadmium Ions Using Au-Nanoparticles Sol-Gel Modified Pt-Wire
AUTOR(ES)
Ensafi, Aliasghar, Allafchian, Ali R., Rezaei, Behzad
FONTE
J. Braz. Chem. Soc.
DATA DE PUBLICAÇÃO
2015-07
RESUMO
In this study, one particular application of in situ pulse anodic stripping voltammetry and polytetrafluoroethylene membrane-based liquid three-phase micro extraction is presented for the micro extraction and quantification of cadmium(II) ions in trace levels. The main factors influencing on preconcentration and micro extraction of cadmium ions such as organic solvent, aqueous feed solution pH and acceptor phases, complexing agent concentration, time of extraction and stirring were examined and discussed in details. The design voltammetric cell was made of three microelectrodes inserted into an extraction cell, containing acceptor solution and then the voltammetric analysis was performed in situ during the extraction time. The enrichment factor and the relative standard deviation, under the optimized conditions, were 15 and 1.7% (n = 5), respectively. The obtained calibration curve was in the range of 1.0-250 nmol L-1 CdIIwith a regression coefficient of 0.9980. The limit of detection was found 0.1 nmol L–1. Due to the high total effective area of the gold nanoparticles and the low analyte concentration, the anodic stripping voltammetric method relies exclusively on the underpotential deposition and stripping process of CdIIon gold, with little hydrogen evolution during deposition at -0.40 V and no gassing at the stripping peak near 0.0 V
Documentos Relacionados
- Antimicrobial activity of
Anonna mucosa (Jacq.) grownin vivo and obtained byin vitro culture - Protective roles of pulmonary rehabilitation mixture in experimental pulmonary fibrosis
in vitro andin vivo - DEVELOPMENT OF ORAL NIFEDIPINE-LOADED POLYMERIC NANOCAPSULES: PHYSICOCHEMICAL CHARACTERISATION, PHOTOSTABILITY STUDIES,
IN VITRO ANDIN VIVO EVALUATION - Antilithiatic Activity of phlorotannin rich extract of
Sarghassum Wightii on Calcium Oxalate Urolithiais –In Vitro andIn Vivo Evaluation - Using the organofunctionalised SBA-15 nanostructured silica as a carbon paste electrode modifier: determination of cadmium ions by differential anodic pulse stripping voltammetry