The instrument uses a plunger pump to pump the sample. Through a multi-channel valve, the sample arrives at photoelectric level meter to be measured. Then it arrives at the digestion/detection cell. Sodium hydroxide and potassium persulfate solution are added and mixed evenly. Under high temperature and high pressure conditions, the nitrogen-containing compounds in the water sample are converted into nitrate nitrogen. After adding hydrochloric acid solution to remove inorganic carbon interference in the water, the absorbance at 220nm and 275nm is calculated. According to A=A220nm-2*A275nm, the absorbance of total nitrogen in the water sample is obtained, and the total nitrogen concentration in the water sample is calculated according to the absorbance standard curve.
The sensor has self-diagnosis function.
The sensor has photoelectric self-balancing function automatic compensation function.
Water sample is digested closed in high temperature and pressure, with high efficiency.
The instrument is not interfered by turbidity and chromaticity of the water sample in analysis.
The instrument has many functions, including standard sample verification, zero point verification, span verification, zero point calibration, standard sample calibration, automatic calibration of working curve, and automatic test of spike recovery rate.
The instrument can be controlled remotely.
The instrument has automatic fault alarm function, such as component failure alarm, over-range alarm, abnormal data alarm, reagent shortage alarm (water sample, distilled water, reagent), and can record and upload these faults.
The instrument has the function of detecting the self-balancing of the optical path.
The instrument adopts an embedded operating system and runs efficiently.
It can be applied to surface water, groundwater, seawater, drinking water sources, pollution sources, industrial wastewater, domestic sewage and other water monitoring.
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