Abstract
A simple method for rapid determination of trace pentavalent vanadium in natural water was presented by flow-injection chemiluminescence (CL). Through water injection, luminol and potassium permanganate were eluted from the anion exchange column to generate the CL, which was enhanced in the presence of V(V). Under the optimum conditions, the increased CL intensity was linear with V(V) concentration in the range from 0.1 to 100 ng mL−1. The limit of detection was 50 pg mL−1 (3σ) and the relative standard deviation (RSD) was 2.24% (n = 5) for a 1.0 ng mL−1 V(V). At a flow rate of 2.0 mL min−1, one cycle of analysis could be performed in 0.5 min with a RSD of less than 3.0%. The proposed method was successfully applied to the determination of vanadium in natural water.
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