DKK brand was founded in 1944 and is headquartered in Shinjuku ku, Tokyo, Japan. It is committed to producing analytical instruments and researching measurement technologies. DKK produces high-performance measuring instruments with water, air, and gas monitoring technologies, covering multiple fields. The NPW-160 Total Phosphorus/Total Nitrogen Analyzer is an automatic monitoring instrument for total phosphorus, total nitrogen, and COD under its umbrella.

-Working principle:

Total phosphorus detection (in accordance with the national standard GB11893-89): Potassium persulfate is used as an oxidant to dissolve the tested water sample at 120 ℃ for 30 minutes, converting phosphides into phosphate ions. Molybdenum blue spectrophotometry is used to detect the total phosphorus content of the water (measurement wavelength: 700nm).

Total nitrogen determination (in accordance with standard HJ636-2012): Potassium persulfate is used as an oxidant to dissolve the water sample at 120 ℃ for 30 minutes, converting nitrogen compounds into nitrate ions. The pH of the sample solution is adjusted to 2-3, and the total nitrogen content in the water is detected by UV spectrophotometry (measurement wavelength: 220nm, 275nm turbidity correction: A=A220-A275 × 2).

COD (UV) determination: Dual wavelength spectrophotometry (UV 254nm, visible 546nm).

-Application industry:

The NPW-160 total nitrogen analyzer/total phosphorus detector 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:

The NPW-160 total nitrogen analyzer/total phosphorus detector is equipped with a multi wavelength detector, which can measure three indicators: total phosphorus, total nitrogen, and COD (UV).

The independently designed heating and decomposition device, as well as the integrated design of digestion measurement in the total phosphorus/total nitrogen analyzer system, simplify pipeline connections.

The NPW-160 total nitrogen analyzer/total phosphorus detector has a built-in CF card, and the data can be stored for a long time.

Equipped with a Chinese touch screen operation interface for fast and accurate reading, coupled with wireless transmission function, intelligent and reliable.

Low reagent consumption and waste liquid discharge, low operation and maintenance costs, and minimal secondary pollution.