Quality control results and influencing factors of two online analysis methods for ammonia nitrogen
This article uses the quality control data of the ammonia nitrogen online analyzers in four automatic wa-ter quality stations in Luzhou City in 2023 to analyze the accuracy,stability and influencing factors of salicylic acid spectrophotometric method and ammonia-sensitive electrode method.The results show that the salicylic acid spec-trophotometric method has good accuracy and stability,but its ability to resist turbidity interference is weak.Water sample pretreatment measures should be strictly implemented and daily cleaning and maintenance of the instrument should be strengthened.The linear range and anti-turbidity interference ability of the ammonia-sensitive electrode method are good,but the system error is large due to the quality of the semipermeable membrane,the concentration of the electrolyte,the fluctuation of the heating temperature and the aging of the electrode.The instrument should be checked regularly and consumables should be replaced in time.
ammonia nitrogensalicylic acid spectrophotometric methodammonia-sensitive electrode methodsurface water automatic monitoring
NETL
NSTL
万方数据
维普
