碱性过硫酸钾消解法在线测定总氮的干扰物分析

Interfering Substance Analysis for Online Determination of Total Nitrogen Using Alkaline Potassium Persulfate Digestion Method

水体中总氮的在线监测是工业废水、市政用水、河、湖库等环境管理部门重要工作。水体中如果存在过高的钙镁离子、余氯以及浊度等均会干扰在线测定结果。本文主要从在线监测过程中紫外线波长的选择,测定试剂的选择与配置,以及如何检验在线监测时仪器的测定用水和试剂的质量方面进行简要分析,并专门研究钼离子在实际运行中对测量干扰,并探讨降低干扰物对在线监测结果影响的措施,以达到准确的监测结果。

Online monitoring of total nitrogen in water bodies is an important task for environmental management departments such as industrial wastewater,municipal water use,rivers,lakes,and reservoirs.If there are too high calcium and magnesium ions,residual chlorine,and turbidity in the water,they will interfere with the online measurement results.This article mainly analyzes the selection of ultraviolet wavelength,the selection and configuration of measuring reagents,and how to verify the quality of measuring water and reagents used in online monitoring.It specifically studies the interference of molybdenum ions on measurement in actual operation and explores measures to reduce the impact of interferences on online monitoring results,in order to achieve accurate monitoring results.