LaMotte MANGANESE KIT - Manual (Page 2)

NOTE: The following metals interfere above these levels:
Zinc 2 ppm
Nickel 4 ppm
Copper 5 ppm
The following metals produce a purple-brown reaction above these levels:
Iron 5 ppm
Cobalt 25 ppm
If metals above these levels are encountered, the Cyanide Inhibitor Package (LaMotte
Code 7104-01) must be used.
PROCEDURE
1. Fill a test tube (0893) to the lower line with sample water.
2. Use 1.0 mL pipet (0372) to add 1.0 mL of *Hardness Buffer Reagent (4255).
3. Add 2 drops of *Metal Inhibitor (2785). Wait 1 minute.
4. Use 0.5 mL pipet (0369) to add 0.5 mL of *Manganese Indicator Reagent (3956).
Cap and mix. Wait 2 minutes.
5. Use 1.0 mL pipet (0354) to add 2.0 mL (two measures) of *Chloroform Reagent
(6203). Cap and mix vigorously for 30 seconds. Allow to stand until the two
layers separate.
6. Insert the Low Range Manganese Octa-Slide 2 Bar (3594-01) into the Octa-Slide 2
Viewer (1101).
7. Insert the test tube into Octa-Slide 2 Viewer (1101).
8. Match the color of the lower liquid layer with the standards. It may be necessary
to raise the tube to compare against the upper end of the bar. Record as ppm
Manganese.
9. Wash the tubes with soap and water after testing to prevent staining.
LaMOTTE COMPANY
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PO Box 329 • Chestertown • Maryland • 21620 • USA
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