水质总氮检测的电化学传感器自动分析系统

Development of an automatic analysis system using an electrochemical sensor for detection of total nitrogen in water

近年来,我国很多江河、湖泊和水库频发藻类水华事件,主要原因是总氮和总磷含量超标。采用基于铜纳米簇的电化学硝酸根传感器,结合顺序注射分析技术,研制了用于水质总氮检测的电化学传感器自动分析系统。实验证明,在0 mg/L^2 mg/L浓度范围内,该自动检测系统对总氮具有较高的检测灵敏度(6.5μA/(mg·L^(-1)))和较好的线性度(0.993)。与现有的总氮自动检测仪器相比,研制的系统具有试剂消耗量少、简单易用、功耗和成本低等优点。

Many rivers,lakes and reservoirs of China have occurred algal bloom events in recent years. The main reason is that the contents of total nitrogen and total phosphorus in water exceed the standard values. An automatic analysis system for detection of total nitrogen in water was developed based on a copper-clusters modified nitrate sensor and sequential injection analysis technique. The experimental results demonstrate that the automatic analysis system features a high sensitivity of 6.5μA/(mg·L-1) and a good linearity of 0.993 with the concentration of total nitrogen ranging from 0 mg/L to 2 mg/L. Compared with other automatic instruments for total nitrogen detection, the developed system has the advantages of low reagent consumption, simple to use, low power consumption and cost.