Determination of dissolved vanadium in natural waters by flow injection analysis with colorimetric detection
Limnol. Oceanogr., 43(3), 1998, 526-529 | DOI: 10.4319/lo.1998.43.3.0526
ABSTRACT: A flow injection technique for the determination of dissolved vanadium in natural waters has been developed. The technique utilizes the vanadium-catalyzed oxidation of Bindschedlers green leuco base by bromate with tiron and tartrate as reaction activators. The reaction product is quantified calorimetrically. A chelator column of immobilized 8-hydroxyquinoline reduces matrix effects but can be eliminated if samples with a constant matrix are being analyzed. By using the chelator column, 1 ml of sample can be analyzed in < 10 min with a detection limit of 0.2 nM. The method has been used successfully for the determination of dissolved vanadium in river and estuarine waters.