【摘要】 为探索用毛细管电泳分离分析建材中的有害重金属,利用毛细管区带电泳(CZE)技术对重金属离子B a2+、C r3+、Cd2+、Pb2+、Hg2+及其它干扰离子进行了同时分离。通过添加有机溶剂乙二醇使各离子峰的半高宽变窄,对影响分离的背景电解质种类和浓度、缓冲液pH、仪器参数等进行了系统优化。定量条件考察结果表明Pb2+和C r3+的最低检测限为0.1μg/mL,其它3种离子的检测限为1.0μg/mL;在检测限至50μg/mL范围内,各离子的浓度与峰面积线性相关系数好于0.999 8。该方法已应用于实际样品分析。更多还原

【Abstract】 Heavy metal ions in building and decorating materials were detected using capillary zone electrophoresis with on-column UV detection to separate Ba(Ⅱ),Cr(Ⅲ),Cd(Ⅱ),Pb(Ⅱ),and Hg(Ⅱ) complexes.The carrier electrolyte parameters such as electrolyte types,concentration and pH,and operational parameters were optimized.The detection limits were 0.1 μg/mL for Pb(Ⅱ) and Cr(Ⅲ),and 1.0 μg/mL for the others.All these metals have a linear relationship between the peak area and the concentration within detection limit of 50 μg/mL.The correlation coefficient is above 0.999 8.This method has been used to analyze metal ions in paint.更多还原