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提出一种电渗驱动，电泳富集和离子选择电极检测相结合的流动分析方法。电渗泵驱动具有流量稳定，流量调节范围大，流向可逆，流动压强较大和驱动电压安全等优点。电泳的电堆积富集法具有设备简单，富集倍数大和可同时分离异种电荷离子等优点。因而该流动分析系统设备简单，电源通用，操作方便，功能多样且检出限低，可用于超低浓度离子的定量分析。文章还进一步探讨了电泳的电堆积原理，以及各种实验条件对富集的影响，并应用此系统对纯净水中的NO3-浓度进行了测定。检出限为2．2×10-8mol/L（n=11，3倍空白标准偏差），回收率可达91.8％～93.6％（添加1倍浓度的NO3-）。
A flow analysis method combining electroosmotic drive, electrophoresis enrichment and ion selective electrode detection is proposed. The osmotic pump drive has the advantages of stable flow rate, large flow regulation range, reversible flow direction, large flow pressure and safe driving voltage. Electrophoresis accumulation of electricity accumulation method has the advantages of simple equipment, large enrichment factor and the simultaneous separation of dissimilar charge ions. Therefore, the flow analysis system has the advantages of simple equipment, universal power supply, convenient operation, diverse functions and low detection limit, and can be used for the quantitative analysis of ultra-low concentration ions. The article further explores the principle of electrophoresis electrophoresis, as well as the impact of various experimental conditions on the enrichment, and the application of this system to determine the concentration of pure water NO3-. The detection limit was 2.2 × 10-8mol / L (n = 11, 3 times the standard deviation of blank), and the recovery rate was 91.8% ~ 93.6% (NO3- was added by 1 time).