Turnes Carou M I, López Mahía P, Muniategui Lorenzo S, Fernández Fernández E, Prada Rodríguez D
Department of Analytical Chemistry, University of A Coruña, A Zapateira, Spain.
J Chromatogr Sci. 2001 Sep;39(9):397-401. doi: 10.1093/chromsci/39.9.397.
Trace-level inorganic anions in seawater are separated efficiently by capillary zone electrophoresis using direct UV detection. The carrier electrolyte is 50 mM borate at pH 9.3 and contained 1.5M NaCl. This buffer solution is adopted to prevent interference from high concentrations of the chloride ion in seawater. No electro-osmotic flow reverser is used to shorten the analysis time. The experimental conditions such as the concentration of NaCl in the carrier electrolyte, capillary inner diameter, applied current, and temperature are optimized. Linear plots are obtained in the concentration range of 0.1 to 20 microg/mL. The quantitation limits of the anions are in the order of 0.02 to 0.1 microg/mL. The proposed method may be applicable to the determination of inorganic anions in other environmental samples and effluents of a power plant.
采用直接紫外检测的毛细管区带电泳法可有效分离海水中痕量无机阴离子。载体电解质为pH 9.3的50 mM硼酸盐，含有1.5M氯化钠。采用该缓冲溶液可防止海水中高浓度氯离子的干扰。未使用电渗流反转器来缩短分析时间。对载体电解质中氯化钠浓度、毛细管内径、施加电流和温度等实验条件进行了优化。在0.1至20μg/mL的浓度范围内获得线性图。阴离子的定量限在0.02至0.1μg/mL的范围内。该方法可能适用于其他环境样品和发电厂废水中无机阴离子的测定。
