2011 |
Toral, M I; Sanchez, G; Fernandez, P; Pizarro, P; Moncada, V; Rivas, J; Richter, P Ferrospectral Sorbed on Deae Sephadex a-25 for the Solid Phase Spectrophotometric Determination of Iron and Cobalt by Batch and Continuous Flow Modes Artículo de revista Journal of the Chilean Chemical Society, 56 (2), pp. 682-687, 2011, ISSN: 0717-9324. Resumen | Enlaces | BibTeX | Etiquetas: continuous determination, determinations, electrode, elements extraction, fe food heavy-metal ions, mixtures, phase samples, sephadex solid spectrometric spectrometry, stripping voltammetry, water @article{RN21, title = {Ferrospectral Sorbed on Deae Sephadex a-25 for the Solid Phase Spectrophotometric Determination of Iron and Cobalt by Batch and Continuous Flow Modes}, author = { M.I. Toral and G. Sanchez and P. Fernandez and P. Pizarro and V. Moncada and J. Rivas and P. Richter}, url = {/brokenurl#<Go to ISI>://WOS:000293676300013}, doi = {10.4067/S0717-97072011000200013}, issn = {0717-9324}, year = {2011}, date = {2011-01-01}, journal = {Journal of the Chilean Chemical Society}, volume = {56}, number = {2}, pages = {682-687}, abstract = {In this work, Ferrospectral;3-(2-pyridyl)-5,6-bis(4-phenylsulfonic acid)-1,2,4-triazine (FST) sorbed on DEAE Sephadex A-25 is used as solid phase for spectrophotometric determination of iron and cobalt by batch and continuos flow modes. In batch simultaneous determination, the second derivative at 536.0 and 601.4 nm were used for iron and cobalt determination, respectively. In this modality, the detection limits (3 sigma criterion), for iron and cobalt were 1.3, 9.1, mu g L(-1) and the determination ranges were: 4.3 to 220 and 30.3 to 800 mu g L(-1). The method by FIA mode was carried out by stopped flow and then the analytical signal was evaluated by second derivative at 560.9 and 482.3 nm for iron and cobalt determination; respectively. In FIA modality, the detection limits for iron and cobalt were 6.4, 31 mu g L(-1), and the determination ranges 21 to 200 and 106 to 1000 mu g L(-1) iron and cobalt, respectively. In both modalities the repeatability for iron and cobalt were <4% and the recovery was near to 100%. These methods were applied successfully in drinking water and soil samples.}, keywords = {continuous determination, determinations, electrode, elements extraction, fe food heavy-metal ions, mixtures, phase samples, sephadex solid spectrometric spectrometry, stripping voltammetry, water}, pubstate = {published}, tppubtype = {article} } In this work, Ferrospectral;3-(2-pyridyl)-5,6-bis(4-phenylsulfonic acid)-1,2,4-triazine (FST) sorbed on DEAE Sephadex A-25 is used as solid phase for spectrophotometric determination of iron and cobalt by batch and continuos flow modes. In batch simultaneous determination, the second derivative at 536.0 and 601.4 nm were used for iron and cobalt determination, respectively. In this modality, the detection limits (3 sigma criterion), for iron and cobalt were 1.3, 9.1, mu g L(-1) and the determination ranges were: 4.3 to 220 and 30.3 to 800 mu g L(-1). The method by FIA mode was carried out by stopped flow and then the analytical signal was evaluated by second derivative at 560.9 and 482.3 nm for iron and cobalt determination; respectively. In FIA modality, the detection limits for iron and cobalt were 6.4, 31 mu g L(-1), and the determination ranges 21 to 200 and 106 to 1000 mu g L(-1) iron and cobalt, respectively. In both modalities the repeatability for iron and cobalt were <4% and the recovery was near to 100%. These methods were applied successfully in drinking water and soil samples. |
2011 |
Ferrospectral Sorbed on Deae Sephadex a-25 for the Solid Phase Spectrophotometric Determination of Iron and Cobalt by Batch and Continuous Flow Modes Artículo de revista Journal of the Chilean Chemical Society, 56 (2), pp. 682-687, 2011, ISSN: 0717-9324. |