DKK-TOA Corporation

Automatic total nitrogen/phosphorus/COD analyzer NPW-160

Measurement item

Measurement object

Concentrations of total nitrogen, total phosphorous, and COD (UV) in the water

Measurement method TN Alkaline potassium peroxodisulfate decomposition (thermal cracking at 120°C for 30 min.) - ultraviolet absorptiometry
TP

Potassium peroxodisulfate decomposition (thermal cracking at 120°C for 30 min.) - molybdenum-blue (ascorbic acid) absorptiometry

COD(UV)

Ultraviolet absorptiometry