Hanna Instruments HI 83200-01 - Manual (Page 38)

74 75 Magnesium
• 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).
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
SPECIFICATIONS
Range 0 to 150 mg/L
Resolution 5 mg/L
Accuracy ±5 mg/L ±3% of reading
Light Source Tungsten lamp with narrow band interference filter @ 466 nm
Method Adaptation of the Calmagite method .
REQUIRED REAGENTS
Code Description Quantity
HI 93752AAAAA-0 Mg Magnesium Buffer Reagent 1 mL
HI 93752BBBBB-0 Mg Magnesium Indicator Reagent 9 mL
REAGENT SETS
HI 937520-01 Reagents for 50 tests
HI 937520-03 Reagents for 150 tests
For other accessories see page 128.
MEASUREMENT PROCEDURE
Note: for sample preparation follow the IRRIGATION WATER (LR) procedure on
page 17.
• Select the
Magnesium method using the procedure described in the
Method Selection section (see page 12).
• Using one 1 mL syringe add exactly 1.00 mL of HI 93752A-0 Mg
Buffer reagent to the cuvette and use the pipette to fill the cuvette
up to the 10 mL mark with the HI 93752B-0 Mg Indicator
reagent.
• Replace the cap and invert several times to mix.
• Place the cuvette into the holder and close the lid.
• Press ZERO key. The display will show “-0.0-” when the meter is zeroed
and ready for measurement.
1 mL
MAGNESIUM