Selective enrichment of sulfides, thiols and methylthiophosphates from water samples on metal-loaded cation-exchange materials for gas chromatographic analysis.
The suitability of using metal-loaded sorbents for solid-phase extraction to enrich organic sulfur compounds from water samples was studied. To test the retention behavior of a number of sulfides, thiols and methylthiophosphates, a cation-exchanger was loaded with various metal ions. The elution behavior of sulfur compounds was investigated with different solvents. A combination of Pb2+-modified cation-exchanger as sorbent and CS2 (1%, v/v) in toluene proved to be the most suitable approach for the given problem. Using GC with a pulsed flame photometric detector yielded detection limits of between 0.6 and 2.9 microg/l. The results showed good reproducibility with relative standard deviations of 2-11%.
Beiner
K
K
UFZ Centre for Environmental Research Halle-Leipzig. Department of Analytical Chemistry, Leipzig, Germany. beiner@ana.ufz.de
Popp
P
P
Wennrich
R
R
D002138:Calibration; D002411:Cation Exchange Resins; D002849:Chromatography, Gas / Q000379:methods*; D008670:Metals; D010710:Phosphates / Q000032:analysis*; D015203:Reproducibility of Results; D013438:Sulfhydryl Compounds / Q000032:analysis*; D013440:Sulfides / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
D002411:Cation Exchange Resins; D008670:Metals; D010710:Phosphates; D013438:Sulfhydryl Compounds; D013440:Sulfides; D014874:Water Pollutants, Chemical; C035638:thiophosphoric acid