进口与国产设备对水质NH_4^+和NO_3^-监测效果分析

Research on Imported and Domestic Equipments for NH_4^+ and NO_3^- Monitoring in Water

通过对国产和进口NH_4^+、NO_3^-检测探头技术性能指标的测试,分析国产和进口水质NH_4^+和NO_3^-监测设备技术性能,确定其适应范围。比较两种仪器对单一纯溶液、复合溶液,以及多种实际水样的准确性和稳定性测试结果,得知两种仪器测定标准溶液及实际水样中NH_4^+和NO_3^-的标准值、实测值都具有较好的一致性,测量结果稳定性较好。国产仪器在≥500 mg/L的NO_3^-条件下误差较大,需稀释后测定,在其他常规质量浓度范围内完全可代替进口仪器,两种仪器均可用于不同环境水体的水质监测。

The technical functions of domestic and imported NH4^+/NO3^-monitoring equipments and their adapting scope were developed by testing the technical performance indexes of NH4^+/NO3^-detection probe.Comparing the accuracy and stability of the two equipments in applying to single standard solution,multi-standard solution and practical samples,the results were consistent and stable.Domestic equipment had relatively large relative deviation when NO3^-≥500 mg/L,dilution was needed before measuring,while in conventional mass concentration range,it could replace imported equipment.Both equipments could be applied to different water environment.