Preconcentrating minicolumn sensors

Grate, J. W., Egorov, O., O Hara, M. J., and DeVol, T. A., Radionuclide sensors for environmental monitoring From flow injection solid phase absorptiometry to equilibration-based preconcentrating minicolumn sensors with radiometric detection, Chem. Rev., 108, 543-563, 2008. 

Nevertheless, sensor materials based on inqnegnated fluors and extractants exhibited limited long-term stability in (heir scintillating properties. This pronqited us to explore an alternative approach for developing preconcentrating minicolumn sensors. Scintillation and chemical selectivity were combined in a conqiosite sensor column by creating an intimate mixture of separate solid phase... 

Figure 1. Preconcentrating minicolumn sensor concept for selective capture of radionuclides with transduction to a light output signal by the process of...

O. Egorov, M. O Hara, J.W. Grate, Equilibration-based preconcentrating minicolumn sensors for trace level monitoring of radionuclides and metal ions in water without consumable reagents. Anal. Chem. 78 (2006) 5480-5490. 

Online detection of radionuclides is also integrated in sensors developed for environmental monitoring. Sensors are constituted by a preconcentrating minicolumn packed with scintillating microspheres, which integrates radiochemical separation and radiometric detection steps within a... 

---