Hanna Instruments HI 83099 - Manual (Page 37)

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SPECIFICATIONS
Range 0.0 to 20.0 mg/L
Resolution 0.1 mg/L
Accuracy ±0.2 mg/L ±3% of reading at 25 °C
Typical EMC ±0.1 mg/L
Deviation
Light Source
Tungsten lamp with narrow band interference filter @ 525 nm
Method Adaptation of the Standard Methods for the Examination of Water and Wastewater,
18 th edition, Periodate method. The reaction between manganese and reagents causes
a pink tint in the sample.
REQUIRED REAGENTS
Code Description Quantity
HI 93709 A-0 Citrate 1 packet
HI 93709 B-0 Sodium periodate 1 packet
REAGENT SETS
HI 93709-01 Reagents for 100 tests
HI 93709-03 Reagents for 300 tests
For other accessories see page 132.
MEASUREMENT PROCEDURE
• Select the Manganese HR method using the procedure described
in the Method Selection section (see page 12).
• Fill the cuvette with 10 mL of unreacted sample (up to the
mark) and replace the cap.
• Place the cuvette into the holder and close the lid.
• Press the Zero key. The display will show “-0.0-” when the meter is zeroed and ready for
measurement.
• Remove the cuvette.
• Add the content of one packet of HI 93709A-0 Citrate reagent.
Replace the cap and invert to mix with gently movements for
2 minutes.
Manganese HR
10 mL
MANGANESE HIGH RANGE
• Remove the cuvette.
• Using the other 1 mL syringe, add to the cuvette exactly 0.5 mL of sample.
Note: Do not mix up the two syringes!
• Replace the cap and invert several times to mix.
• Reinsert the cuvette into the instrument.
• Press Timer and the display will show the countdown prior to the measurement or, alternatively, wait
for 15 seconds and press Read. When the timer ends the meter will perform the reading.
• The instrument displays the results in mg/L of magnesium (Mg 2+ ).
INTERFERENCES
Interferences may be caused by:
Acidity (as CaCO
3
) above 1000 mg/L
Alkalinity (as CaCO
3
) above 1000 mg/L
Calcium (Ca 2+ ) above 200 mg/L
Iron must be absent
Aluminum must be absent
Copper must be absent
0.5 mL
of sample
Magnesium