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| Determination of Trace Vanadium in Environmental Water Samples by Xylenol Orange-Potassium Bromate System -Sequential Injection-Catalytic Spectrophotometry |
| Received:April 02, 2014 Revised:May 20, 2014 |
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| DOI：doi:10.3969/j.issn.2095-1035.2014.03.001 |
| KeyWord:vanadium(IV);xylenol orange;potassium bromate;catalytic spectrophotometry;sequential injection |
| Author | Institution |
| ZHAO Shijing |
东北大学 理学院 分析科学研究中心，沈阳 ） |
| LI Hongli |
东北大学 理学院 分析科学研究中心，沈阳 ） |
| FAN Shihua |
东北大学 理学院 分析科学研究中心，沈阳 ） |
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| Abstract: |
| In acidic medium, potassium bromate could oxidize and decolorize the xylenol orange under the catalysis of micro V(IV). A new catalytic spectrophotometric method combined with sequential injection has been used for the determination of trace V(IV) based on this oxidation reaction. Under the optimized experimental conditions, the linear ranges were 0.5~50 ng/mL with the detection limit of 0.4 ng/mL. The relative standard deviation for eleven replicate determinations of the certified reference materials containing 10 ng/mL V(IV) was 1.1%. The method has been used in the determination of trace vanadium in environmental water samples with recovery over 91%~108%. |
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