Journal
MICROCHIMICA ACTA
Volume 161, Issue 1-2, Pages 143-148Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-007-0762-7
Keywords
vanadium; cloud point extraction; methylene blue; Triton X-100; GFAAS
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This work describes a new analytical procedure for trace vanadium by graphite furnace atomic absorption spectroscopy coupled to cloud point extraction (CPE) as the separation-preconcentration method. The CPE behavior of vanadium using methylene blue as complex agent and Triton X-100 as a surfactant was investigated systematically. Under the optimized conditions, the detection limit was 0.7 ng center dot mL(-1), and the relative standard deviation was 4.3% for vanadium (c = 50.0 ng center dot mL(-1), n = 5). The recovery of vanadium was in the range of 98.9-102.8%. The method was applied to the analysis of vanadium in certified reference materials and real samples. The results obtained were in good agreement with the certified values.
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