User Manual

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CALCIUM
SPECIFICATIONS
Range 0 to 400 mg/L
Resolution 10 mg/L
Accuracy ±10 mg/L ±5% of reading at 25 °C
Light Source Tungsten lamp with narrow band interference filter @ 466 nm
Method Adaptation of the Oxalate method.
REQUIRED REAGENTS
Code Description Quantity
- Buffer Reagent 4 drops
HI 93752A-0 Ca Calcium Buffer Reagent 7 mL
HI 93752B-0 Ca Calcium Oxalate Reagent 1 mL
REAGENT SETS
HI 937521-01 Reagents for 50 tests
HI 937521-03 Reagents for 150 tests
For other accessories see page 128.
MEASUREMENT PROCEDURE
Note: for sample preparation follow the COLORED OR TURBID SAMPLES procedure at page 17.
• Select the Calcium method using the procedure described in the Method Selection section (see page 12).
• Using the 5 mL syringe add exactly 3.00 mL of sample to the cuvette.
• Use the pipette to fill the cuvette up to the
10 mL mark with the HI 93752A-0 Calcium
Buffer Reagent.
• Add 4 drops of Buffer Reagent.
Calcium
• Remove the cuvette and add the content of one packet of
HI 93716-0 DPD reagent. Replace the cap and shake gently for
about 20 seconds to dissolve most of the reagent.
• Reinsert the cuvette into the instrument.
• Press Timer and the display will show the countdown prior to the measurement or, alternatively, wait
for 2 minutes 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 bromine.
INTERFERENCES
Interference may be caused by: Chlorine, Iodine, Ozone, Oxidized forms of Chromium and Manganese.
In case of water with hardness greater than 500 mg/L CaCO
3
, shake the sample for approximately
2 minutes after adding the reagent.
In case of water with alkalinity greater than 250 mg/L CaCO
3
or acidity greater than 150 mg/L CaCO
3
,
the color of the sample may develop only partially, or may rapidly fade. To resolve this, neutralize the
sample with diluted HCl or NaOH.
Bromine
3 mL of sample