GB/T 11894-1989 《Water quality--Determination of total nitrogen--Alkaline potassium persulfate digestion-UV spectro photo metric method》 Related products

This standard specifies a method for the determination of total nitrogen in water using alkaline potassium persulfate digestion at 120-124 ° C and Ultraviolet spectrophotometry. It is suitable for the detection of total nitrogen in surface water, groundwater nitrite nitrogen, nitrate nitrogen, inorganic nitrogen salts, dissolved ammonia and most organic nitrogen compounds. The minimum detection concentration of the method is 0.050 mg/L, and the upper limit of the determination is 4 mg/L. This standard is applicable to environment monitoring and water quality assessment.