LaMotte DC1600 Colorimeter - Manual (Page 51)

MANGANESE ~ LOW RANGE
PAN METHOD CODE 3658
QUANTITY CONTENTS CODE
2 x 60 mL *Hardness Buffer Reagent *4255-H
30 mL *Manganese Indicator Reagent *3956-G
15 mL *Sodium Cyanide, 10% *6565-E
1 Pipet, 0.5 mL, plastic 0369
1 Pipet, 1.0 mL, plastic 0354
*WARNING: Reagents marked with a * are considered hazardous substances. Material Safety Data Sheets (MSDS) are supplied for
these reagents. For your safety read label and accompanying MSDS before using.
Manganese is present in ground water in the divalent state due to the lack of oxygen. In surface waters manganese may be
in various oxidation states as soluble complexes or as suspended compounds. Manganese is rarely present in excess of 1
mg/L. It may cause an objectionable taste or cause staining problems in laundry, but manganese levels normally
encountered in water seldom produce any health hazard.
Manganese is removed from water by various means including chemical precipitation, pH adjustment, aeration,
superchlorination and the use of ion exchange resins.
APPLICATION: Drinking and surface waters; domestic and industrial wastewaters.
RANGE: 0.0 – 0.9 mg/L Manganese
METHOD: PAN (1–(2–Pyridylazo)–2–Naphthol) forms a red complex with Manganese (Mn 2+ ) at a pH
of 8 to 10.
SAMPLE HANDLING
& PRESERVATION: Manganese may oxidize readily in neutral water and precipitate from solution. It may adhere or
be absorbed by container walls, especially glass. Acidified sample can be stored in plastic.
INTERFERENCES: None. Test is quite specific.
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