Analyzed parameters

Analytical methods

COD

Potassium dichromate method (GB/T 11914-1989)

NH3-N

Distillation and titration method (GB/T 7478-1987)

Total Nitrogen (TN)

Alkaline potassium sulfate nodule method (GB 11894-89)

Cl

Color rendering titration method (GB/T 13025.5-2012)

SO 4 2

Barium capacity method (GB/T 13025.8-2012)