56
57
Fluoride
FLUORIDE
SPECIFICATIONS
Range
0.00 to 2.00 mg/L
Resolution
0.01 mg/L
Accuracy
±5% of reading
Typical EMC
±0.01 mg/L
Deviation
Light Source
Tungsten lamp with narrow band interference filter @ 575 nm
Method
Adaptation of the
Standard Methods for the Examination of Water and Wastewater,
18
th
edition, SPADNS method. The reaction between fluoride and the liquid reagent
causes a red tint in the sample.
REQUIRED REAGENT
Code
Description
Quantity
HI 93729-0
SPADNS Reagent
4 mL
REAGENT SETS
HI 93729-01
Reagents for 100 tests
HI 93729-03
Reagents for 300 tests
For other accessories see page 128.
MEASUREMENT PROCEDURE
• Select the
Fluoride method using the procedure described in the
Method Selection section (see page 12).
• Add 2 mL of HI 93729-0 SPADNS Reagent to two cuvettes.
• Fill one of the cuvettes with distilled water up to the mark,
replace the cap and invert several times to mix.
• Fill the other cuvette with sample up to the mark, replace the
cap and invert several times to mix.
• Place the cuvette with the reacted distilled water (# 1) into
the holder and close the lid.
10 ml
10 ml
# 1
# 2
2 ml
# 1
Cyanuric Acid
• Fill a second cuvette with 10 mL of the reacted sample up to the
mark. Replace the cap.
• Reinsert the cuvette into the instrument.
• Press TIMER and the display will show the countdown prior to the measurement or, alternatively, wait
for 45 seconds and press READ. When the timer ends the meter will perform the reading.
• The instrument displays concentration in mg/L of cyanuric acid.
10 mL
