- working principle:

 

Total phosphorus (according to international GB11893-89): Add potassium persulfate as oxidant to the sample, digest the water sample to be tested at 120 ℃ for 30min, convert the phosphide into phosphate ion, and use the molybdenum blue method to absorb water to detect the water quality The total phosphorus content (measurement wavelength: 700nm)

 

Total nitrogen and potassium persulfate are used as oxidants (according to international GB11893-89): potassium persulfate is used as oxidizer and digested at 120 ° C for 30 minutes to convert the nitrogen-containing compounds into nitrate ions and adjust the pH of the sample solution to 2- 3; The content of total nitrogen in water quality is detected by ultraviolet absorption spectrophotometry (measurement wavelength: 220nm, 275nm turbidity correction: A = A220-A275 × 2)

 

COD (UV): dual-wavelength absorbance photometry (UV 254nm, visible light 546nm)

 

 

 

-Application industry:

 

The NPW-160 total phosphorus / total nitrogen analyzer is mainly used for automatic monitoring of total phosphorus, total nitrogen and COD in surface water, tap water, municipal sewage or other special occasions.

 

 

 

-Instrument features:

 

● Independently designed heating decomposition device

 

● The system can realize wireless transmission

 

● Built-in CF card, data can be stored for a long time

 

● Low operating cost and less secondary pollution

 

● Integrated design simplifies pipeline connection

 

● Advanced multi-wavelength detector can measure three indicators: total phosphorus, total nitrogen, COD (UV)

 

 

 

- Product advantages:

 

● Built-in multi-wavelength detector, one measurement can get two parameters at the same time, including total nitrogen and total phosphorus;

 

● According to JIS standard (heating at 120 oC for 30 min), the same measurement method is adopted; it has good accuracy and stability;

 

● Low operating cost, reduce reagent consumption and waste liquid discharge;

 

● Built-in multiple functions, data storage card (can save one year of measurement data), reagent quantitative sampling system;

 

● Can be equipped with wireless transmission function.

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