Based on the sensitive reaction of Co(II) and salicyl fluorone with the presence of cetylpyridinium bromide in basic solution, a new method of flow injection micelle-solubilized spectrophotometry was developed for the determination of cobalt. The reaction was monitored for the absorbance of Co(II) at 540 nm. The reagents, flow injection variables and effects of foreign ions were investigated and the optimum conditions were established. At the optimum test conditions, the developed method provides a linearity range of 3–40 μg L−1 with a detection limit of 0.1 μg L−1 at about 60 h−1 sampling frequency. Relative standard deviation of 0.91, 0.95 and 0.89% were obtained for the determination of 3, 15 and 30 μg L−1 Co(II) solution. The proposed method has been successfully applied for analysis of trace amounts of cobalt in water samples.
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Research Article|
August 12 2014
A method of high sensitivity and in situ determination of trace cobalt(II) in water samples with salicyl fluorone
Zhe Chen
;
Zhe Chen
1School of Environment and Resource, Southwest University of Science and Technology, Mianyang Sichuan 621010, China
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Hua Li
2School of National Defence Science and Technology, Southwest University of Science and Technology, Mianyang Sichuan 621010, China
E-mail: 975916422@qq.com
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Water Sci Technol (2014) 70 (7): 1182–1187.
Article history
Received:
April 09 2014
Accepted:
July 31 2014
Citation
Zhe Chen, Hua Li; A method of high sensitivity and in situ determination of trace cobalt(II) in water samples with salicyl fluorone. Water Sci Technol 1 October 2014; 70 (7): 1182–1187. doi: https://doi.org/10.2166/wst.2014.354
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Zhe Chen, Hua Li; A method of high sensitivity and in situ determination of trace cobalt(II) in water samples with salicyl fluorone. Water Sci Technol 1 October 2014; 70 (7): 1182–1187. doi: https://doi.org/10.2166/wst.2014.354
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