LaMotte SMART Spectro Spectrophotometer - Manual (Page 180)

MANGANESE, LOW RANGE
PAN METHOD • CODE 3658-01-SC
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 an * are considered to be potential health
hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents
go to 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
MDL: 0.02 ppm
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. Acidifi ed sample can
be stored in plastic.
INTERFERENCES: None. Test is quite specifi c.
SMART Spectro Test Procedures 2.11 MANGANESE, Low Range
Test P
rocedures