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Manganese ~ low range – LaMotte DC1600 Colorimeter User Manual

Page 51

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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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