Abstract − Analytical Sciences, 22(12), 1585 (2006).
Separation of V(V)-4-(2-pyridylazo)resorcinolato Complex from a Large Excess Reagent Using an ODS Cartridge for High-Performance Liquid Chromatography
Toru TAKAHASHI, Emiko KANEKO, and Takao YOTSUYANAGI
Department of Molecular Engineering, Faculty of Engineering, Tohoku University, 07 Aoba, Aramaki, Aoba, Sendai 980-8579, Japan
A selective off-line preconcentration technique for the V(V) complex with 4-(2-pyridylazo)resorcinol has been developed and successfully applied to the determination of V(V) in an air-borne sample. The target complex was separated from excess reagent using an ODS cartridge and water as the eluent. The complex was then concentrated on another ODS cartridge using tetrabutylammonium bromide and eluted with methanol; the eluate was applied to a one-drop concentration/HPLC. A detection limit as low as (6.05 ± 0.82)× 10-11 M (5 ppt) was achieved.
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