Hanna Instruments HI 83099 - Manual (Page 38)

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Manganese LR
MANGANESE LOW RANGE
SPECIFICATIONS
Range 0 to 300 µ g/L
Resolution 1 µ g/L
Accuracy ±10 µ /L ±3% of reading at 25 °C
Typical EMC ±1 µ g/L
Deviation
Light Source
Tungsten lamp with narrow band interference filter @ 575 nm
Method Adaptation of the PAN Method. The reaction between manganese and the reagents
causes an orange tint in the sample.
REQUIRED REAGENT
Code Description Quantity
HI 93748 A-0 Ascorbic acid 2 packets
HI 93748 B-0 Alkaline-cyanide sol. 0.40 mL
HI 93748 C-0 0.1% PAN indicator 2 mL
HI 93703-51 Dispersing Agent 4-6 drops
REAGENT SETS
HI 93748-01 Reagents for 50 tests
HI 93748-03 Reagents for 150 tests
For other accessories see page 132.
MEASUREMENT PROCEDURE
• Select the Manganese LR method using the procedure described in the Method Selection section (see
page 12).
• Fill one cuvette with 10 mL of deionized water (up to the mark).
• Fill a second cuvette with 10 mL of sample (up to the mark).
• Add the content of one packet of HI 93748A-0 Ascorbic acid to
each cuvette, replace the caps and shake gently until completely
dissolved.
10 mL
10 mL
Manganese HR
• Add the content of one packet of HI 93709B-0 Sodium
Periodate reagent. Replace the cap and invert to mix with
gently movements for 2 minutes.
• Reinsert the cuvette into the instrument.
• Press Timer and the display will show the countdown prior to the measurement or, alternatively, wait
for 1 minute and 30 seconds and press Read. When the timer ends the meter will perform the reading.
The instrument displays the results in mg/L of manganese.
• Press ▲ or ▼ to access the second level functions.
• Press the
Chem Frm key to convert the result in mg/L of potassium permanganate (KMnO
4
) and
permanganate (MnO
4
¯).
• Press ▲ or ▼ to return to the measurement screen.
INTERFERENCES
Interference may be caused by:
Calcium above 700 mg/L
Chloride above 70000 mg/L
Iron above 5 mg/L
Magnesium above 100000 mg/L.