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

作者：Guo, Xiao Ming; Xu, Xiang Dong; Zhang, Hui Jing; Hu, Yong Gang^*; Zhang, Jie

来源：Chinese Chemical Letters, 2007, 18(9): 1095-1098.

DOI：10.1016/j.cclet.2007.06.015

• capillary electrophoresis
• chemiluminescence
• Co(II)
• Cu(II)

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 alpha-HIBA (adjusted to pH 4.8 by HAc solution). The post-capillary reagent was 2.0 mmol/L K3Fe(CN)(6) which was adjusted to pH 13.0 by NaOH solution. Under the optimum conditions, the detection limits (S/N = 3) for Co(H) and Cu(II) were 7.5 x 10(-11) mol/L and 7.5 x 10(-9) mol/L, with the linear range of 7.5 x 10(-9) mol/L to 1.0 x 10(-6) mol/L and 7.5 x 10(-8) mol/L to 5.0 x 10(-5) mol/L, respectively.

• 出版日期2007-9
• 单位华中科技大学