LaMotte SMART Spectro Spectrophotometer - Manual (Page 160)

MANGANESE–LOW RANGE
PAN METHOD • CODE 3658-01-SC
QUANTITY CONTENTS CODE
4 x 30 mL * Hardness Buffer Reagent *4255-G
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 to be potential health hazards. To view
or print a Material Safety Data Sheet (MSDS) for these reagents see MSDS CD or
www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
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: 0.00–0.70 ppm Manganese
METHOD: PAN (1–(2–Pyridylazo)–2–Naphthol) forms a red complex
with Manganese (Mn
2+ ) at a pH of 10 to 11.
SAMPLE
HANDLING &
PRESERVATION: Manganese may oxidize readily in neutral water and
precipitate from solution. It may adhere to or be absorbed by
container walls, especially glass. Acidified sample can be
stored in plastic.
INTERFERENCES: None. Test is quite specific.
SMART SPECTRO TEST PROCEDURES 05.04 Manganese–LR 1/2