2011 |
Saavedra, R; Soto, C; Yanez, J; Toral, M I Determination of Cobalt in Water Samples by Photoacoustic Spectroscopy with a Solid-Phase Spectrophotometry Approach Using 3-(2-Pyridyl)-5,6-Bis (4-Sulfophenyl)-1,2,4-Triazine Artículo de revista Microchemical Journal, 98 (2), pp. 220-224, 2011, ISSN: 0026-265x. Resumen | Enlaces | BibTeX | Etiquetas: atomic-absorption-spectrometry, chelating cobalt, emission-spectrometry, extraction, ferrozine ferrozine, icp-ms, nickel, online optothermal phase photoacoustic preconcentration, resin, solid spectroscopy, trace-metals, window @article{RN16, title = {Determination of Cobalt in Water Samples by Photoacoustic Spectroscopy with a Solid-Phase Spectrophotometry Approach Using 3-(2-Pyridyl)-5,6-Bis (4-Sulfophenyl)-1,2,4-Triazine}, author = { R. Saavedra and C. Soto and J. Yanez and M.I. Toral}, url = {/brokenurl#<Go to ISI>://WOS:000290749600008}, doi = {10.1016/j.microc.2011.02.003}, issn = {0026-265x}, year = {2011}, date = {2011-01-01}, journal = {Microchemical Journal}, volume = {98}, number = {2}, pages = {220-224}, publisher = {2011 Elsevier B.V.}, abstract = {This work forms part of an investigation which seeks to determine metal complexes in a solid phase by photoacoustic spectrometry (PAS). Results of spectral determination of Co(II) complexes are introduced. The method is based on Co(II) calorimetric reaction with 3-(2-pyridyl)-5,6-bis(4-sulfophenyl)-1,2,4-triazine (FST, ferrozine) retained on an anion-exchange resin, DEAE Sephadex A-25. The immobilization of Co(II) on the solid phase is combined with PAS measurement. A numerical approach is applied to reduce noise in the spectral data. At lambda = 477 nm, the calibration for Co(II) is linear over the range 14-300 mu gL(-1). The Co(II) concentration in water samples was determined by conventional photoacoustic measurement. The relative standard deviation (R.S.D.) of the method for the calibration is <5%. Under optimized conditions, the obtained analytical features were LOD 14 mu gL(-1) and LOQ 45 mu gL(-1).}, keywords = {atomic-absorption-spectrometry, chelating cobalt, emission-spectrometry, extraction, ferrozine ferrozine, icp-ms, nickel, online optothermal phase photoacoustic preconcentration, resin, solid spectroscopy, trace-metals, window}, pubstate = {published}, tppubtype = {article} } This work forms part of an investigation which seeks to determine metal complexes in a solid phase by photoacoustic spectrometry (PAS). Results of spectral determination of Co(II) complexes are introduced. The method is based on Co(II) calorimetric reaction with 3-(2-pyridyl)-5,6-bis(4-sulfophenyl)-1,2,4-triazine (FST, ferrozine) retained on an anion-exchange resin, DEAE Sephadex A-25. The immobilization of Co(II) on the solid phase is combined with PAS measurement. A numerical approach is applied to reduce noise in the spectral data. At lambda = 477 nm, the calibration for Co(II) is linear over the range 14-300 mu gL(-1). The Co(II) concentration in water samples was determined by conventional photoacoustic measurement. The relative standard deviation (R.S.D.) of the method for the calibration is <5%. Under optimized conditions, the obtained analytical features were LOD 14 mu gL(-1) and LOQ 45 mu gL(-1). |
2011 |
Determination of Cobalt in Water Samples by Photoacoustic Spectroscopy with a Solid-Phase Spectrophotometry Approach Using 3-(2-Pyridyl)-5,6-Bis (4-Sulfophenyl)-1,2,4-Triazine Artículo de revista Microchemical Journal, 98 (2), pp. 220-224, 2011, ISSN: 0026-265x. |