Abstract
Abstract A new effective and simple method has been developed to concentrate trace analytes from the organic phase after conventional extraction. Micro volume of high boiling-point water miscible solvent (solvent A), such as dimethylsulfoxide, is added to the separated organic phase and the low boiling-point organic solvent (solvent B), such as chroloform, is removed by evaporation to concentrate the analytes in the solvent A. This method has been successfully applied to the ion-pair solvent extraction system of cobalt with 2,2′-dihydroxyazobenzene as a powerful preconcentration technique for reversed-phase high-performance liquid chromatography of the metal chelates. The detection limit is 6 × 10−10 mol dm−3.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
