1.1 Methods
Notes:
1. This test is applicable for the determination of soluble Manganese in water and
wastewater.
2. Highly buffered water samples or extreme pH values may exceed the buffering
capacity of the reagents and requires sample pre-treatment.
If samples were acidified for storing, adjust the pH between 4 and 5 with 5 mol/l (5 N)
Sodium hydroxide before test. Do not exceed pH 5, as manganese may precipitate.
3. Interferences:
Interfering substance Interference level
Calcium greater than 700 mg/l
Chloride greater than 70 000 mg/l
Iron greater than 5 mg/l
Magnesium greater than 100 000 mg/l
4.
Mn
MnO
4
KMnO
4