Flow-injection spectrophotometric determination of vanadium with malachite green oxalate by bromate in acidic and micellar medium  

作　　者：Mohsen Keyvanfarda Narges Abedib 

机构地区：[1]Faculty of Science,Majlesi Branch,Islamic Azad University [2]Group of Chemistry,Shahreza Branch,Islamic Azad University

出　　处：《Rare Metals》2011年第3期216-221,共6页稀有金属（英文版）

摘　　要：A flow injection method is proposed for determining vanadium（V）. The method is based on its catalytic effect on the oxidation of malachite green oxalate by bromate. The reaction was monitored spectrophotometrically by measuring malachite green oxalate absorbance at λmax = 625 nm. The reagents and manifold variables, which have influences on the sensitivity, were investigated and the optimum conditions were established. The optimized conditions made it possible to determine vanadium in the ranges of 10-140 ng/mL with a detection limit of 5.2 ng/mL and a sample rate of 20 ± 5 samples/h.A flow injection method is proposed for determining vanadium（V）. The method is based on its catalytic effect on the oxidation of malachite green oxalate by bromate. The reaction was monitored spectrophotometrically by measuring malachite green oxalate absorbance at λmax = 625 nm. The reagents and manifold variables, which have influences on the sensitivity, were investigated and the optimum conditions were established. The optimized conditions made it possible to determine vanadium in the ranges of 10-140 ng/mL with a detection limit of 5.2 ng/mL and a sample rate of 20 ± 5 samples/h.

关 键 词：VANADIUM flow injection analysis malachite green oxalate SPECTROPHOTOMETRY micellar medium 

分 类 号：TG115.33[金属学及工艺—物理冶金]