Citation: Xiao Ming Guo, Xiang Dong Xu, Hui Jing Zhang, Yong Gang Hu, Jie Zhang. A novel method for Co (Ⅱ) and Cu (Ⅱ) analysis by capillary electrophoresis with chemiluminescence detection[J]. Chinese Chemical Letters, ;2007, 18(9): 1095-1098. doi: 10.1016/j.cclet.2007.06.015 shu

A novel method for Co (Ⅱ) and Cu (Ⅱ) analysis by capillary electrophoresis with chemiluminescence detection

a Institute of Environmental Science & Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;
b Department of Chemistry, Huazhong University of Science and Technology, Wuhan 430074, China

Received Date: 2 February 2007

Fund Project: This work was supported by the National Natural Science Foundation of China (No.20005005).

Based on the fact that some metal ions can catalyze the chemiluminescence (CL) reaction of luminol with K₃Fe (CN) ₆, a novel capillary electrophoresis CL method was developed for the determination of Co (Ⅱ) and Cu (Ⅱ). The separation was carried out with a 10 mmol/L sodium acetate solution containing 0.8 mmol/L luminol and 2.0 mmol/L α-HIBA (adjusted to pH 4.8 by Hac solution). The post-capillary reagent was 2.0 mmol/L K₃Fe (CN) ₆which was adjusted to pH 13.0 by NaOH solution. Under the optimum conditions, the detection limits (S/N=3) for Co (Ⅱ) and Cu (Ⅱ) were 7.5×10^-11 mol/L and 7.5×10^-9 mol/L, with the linear range of 7.5×10^-9 mol/L to 1.0×10^-6 mol/L and 7.5×10^-8 mol/L to 5.0×10^-5 mol/L, respectively.
- Capillary electrophoresis,
- Chemiluminescence,
- Co (Ⅱ),
- Cu (Ⅱ)
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