Hanna Instruments HI 83099 - Manual (Page 39)

77 76 Manganese LR
• Insert the second cuvette with the reacted sample into the instrument.
• Press Read to start the reading. The instrument displays the results in µµµµµ g/L of manganese.
• Press ▲ or ▼ to access the second level functions.
• Press the
Chem Frm key to convert the result in µ g/L of potassium permanganate (KMnO
4
) and
permanganate (MnO
4
¯).
• Press ▲ or ▼ to return to the measurement screen.
INTERFERENCES
Interference may be caused by:
Aluminum above 20 mg/L
Cadmium above 10 mg/L
Calcium above 200 mg/L as CaCO
3
Cobalt above 20 mg/L
Copper above 50 mg/L
Iron above 10 mg/L
Lead above 0.5 mg/L
Magnesium above 100 mg/L as CaCO
3
Nickel above 40 mg/L
Zinc above 15 mg/L.
Manganese LR
• Add 0.2 mL of the HI 93748B-0 Alkaline-cyanide reagent
solution to each cuvette, replace the caps and invert gently
to mix for about 30 seconds.
• Add 1 mL of the HI 93748C-0 0.1% PAN indicator
solution to each cuvette, replace the caps and shake
gently.
• Add 3 drops of Dispersing Agent (HI 93703-51) to each
cuvette, replace the caps and invert gently to mix for
about 30 seconds.
• Place the cuvette with the reacted deionized water (blank)
into the holder and close the lid.
• Press Timer and the display will show the countdown prior to zeroing the blank. Alternatively wait for
2 minutes and then press Zero. The display will show “-0.0-” when the meter is zeroed and ready for
measurement.