%0 Journal Article %1 RN16 %A Saavedra, R. %A Soto, C. %A Yanez, J. %A Toral, M.I. %D 2011 %I 2011 Elsevier B.V. %J Microchemical Journal %K atomic-absorption-spectrometry, chelating cobalt, dqcauchile emission-spectrometry, extraction, ferrozine ferrozine, icp-ms, nickel, online optothermal phase photoacoustic preconcentration, resin, solid spectroscopy, trace-metals, window, %N 2 %P 220-224 %R 10.1016/j.microc.2011.02.003 %T 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 %U /brokenurl#<Go to ISI>://WOS:000290749600008 %V 98 %X 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).

@article{RN16, 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). }, added-at = {2019-12-04T03:57:35.000+0100}, author = {Saavedra, R. and Soto, C. and Yanez, J. and Toral, M.I.}, biburl = {https://www.bibsonomy.org/bibtex/2296e1fb94795d7eb973b4d64735063a5/dqcauchile}, doi = {10.1016/j.microc.2011.02.003}, interhash = {f90b6cbdca06cf139b3e4344eda764d8}, intrahash = {296e1fb94795d7eb973b4d64735063a5}, issn = {0026-265x}, journal = {Microchemical Journal}, keywords = {atomic-absorption-spectrometry, chelating cobalt, dqcauchile emission-spectrometry, extraction, ferrozine ferrozine, icp-ms, nickel, online optothermal phase photoacoustic preconcentration, resin, solid spectroscopy, trace-metals, window,}, number = 2, pages = {220-224}, publisher = {2011 Elsevier B.V.}, timestamp = {2019-12-04T03:58:17.000+0100}, 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}, type = {Journal Article}, url = {/brokenurl#<Go to ISI>://WOS:000290749600008}, volume = 98, year = 2011 }