30
31
• 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.
CALCIUM
SPECIFICATIONS
Range
0 to 400 mg/L
Resolution
10 mg/L
Accuracy
±10 mg/L ±5% of reading
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 93752
A
-0 Ca Calcium Buffer Reagent
7 mL
HI 93752BBBBB-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 IRRIGATION WATER (LR) 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.
• Add 4 drops of Buffer Reagent.
• Use the pipette to fill the cuvette up to the 10 mL mark with
the HI 93752A-0 Calcium Buffer Reagent.
Calcium
3 mL of sample
Bromine
