Determination of Metal Ions in Water Samples by Capillary Electrophoresis with Indirect UV Method
A simple indirect UV method was developed for the separation of ten trace metal ions by capillary electrophoresis.The background electrolyte contains 15 mmol/L imidazole as the chromophore for indirect UV detection, and acetic acid functioned as a pH modifier for adjusting pH to 3.7 and weak complex reagent.All cations were separated completely within 8 min under hydrodynamic injection mode with a running voltage of +18 kV at 25 ℃.The limits of detection ranged from 0.02 mg/L to 0.21 mg/L and relative standard deviations (n =5) were in the range from 2.1% to 4.2%.The minimum quantitative levels located in the range between 0.10 mg/L and 0.47 mg/L and the maxima between 30 mg/L and 60 mg/L.The recovery for standards and actual water samples was also investigated respectively.The results demonstrate that the method is convenience and reproducible for practical analysis of water systems.
capillary electrophoresis metal ions indirect method water samples
Mei SHI Qingyu GAO Yongchao LU Jiamin FENG
School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, P.R.China
国内会议
北京
英文
475-479
2010-12-18（万方平台首次上网日期，不代表论文的发表时间）