Chemicals

Citric Acid, 1 M

Cobalt Nitrate, 8% w/v

COD STANDARD 50.0 PPM 2 MONTH EXPIRATION AQUEOUS SOLUTION

COD STANDARD 200 PPM 2 MONTH EXPIRATION AQUEOUS SOLUTION

COD Standard, 500 ppm COD

Color Std, APHA, No. 500

Color Std, APHA, No. 500

Color Std, APHA, No. 2

Color Std, APHA, No. 3

Color Std, APHA, No. 4

COLOR STANDARD 6 UNITS APHA

COLOR STANDARD 7 UNITS APHA

Color Std, APHA, No. 20

Color Std, APHA, No. 50

Color Std, APHA, No. 100

Color Std, APHA, No. 200