Zusammenfassung
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).
- 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,
Nutzer