44
45
Nickel LR
• Press TIMER and the display will show a countdown prior to adding reagent C or, alternatively, wait
for 15 minutes. Add one packet of HI 93740C-0 EDTA reagent to each beaker, cap and swirl to mix
until completely dissolved.
• Fill one cuvette up to the mark with 10 mL of the blank.
• 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.
• Fill a second cuvette up to the mark with 10 mL of the reacted sample.
• Insert the second cuvette into the instrument.
• Press READ to start the reading. The instrument dis-
plays the results in mg/L of nickel.
Note
:
a temperature above 30°C may cause turbidity. In this case, before zeroing and taking readings,
add 2-3 drops of Dispersing Agent (HI 93703-51) to each cuvette and swirl until turbidity is removed.
10 mL
10 mL
Nickel LR
NICKEL LOW RANGE
SPECIFICATIONS
Range
0.000 to 1.000 mg/L
Resolution
0.001 mg/L
Accuracy
±0.010 mg/L ±7% of reading
Typical EMC
±0.001 mg/L
Deviation
Light Source
Tungsten lamp with narrow band interference filter @ 575 nm
Method
Adaptation of the PAN method. The reaction between nickel and the reagents causes
an orange tint in the sample.
REQUIRED REAGENTS
Code
Description
Quantity
HI 93740A-0
Phthalate-phosphate
2 packets
HI 93740B-0
0.3% PAN indicator
2 mL
HI 93740C-0
EDTA
2 packets
HI 93703-51
Dispersing Agent
4-6 drops (only when necessary, see note)
REAGENT SETS
HI 93740-01
Reagents for 50 tests
HI 93740-03
Reagents for 150 tests
For other accessories see page 73.
MEASUREMENT PROCEDURE
• Select the
Nickel LR method using the procedure described in the
Method Selection section (see page 12).
Note
:
for best results perform your tests between 20-24°C.
• Fill one graduated beaker with 25 mL of deionized water (blank) and
another one with 25 mL of sample.
• Add the content of one packet of HI 93740A-0 Phthalate-phosphate
reagent to each beaker. Cap and swirl gently until the reagent is
dissolved.
Note
:
If sample contains iron (Fe
3+
), it is important that all powder
be dissolved completely before continuing with following step.
• Add 1 mL of HI 93740B-0 0.3% PAN solution to each beaker, cap
and swirl to mix.
