54
Fluoride
FLUORIDE
SPECIFICATIONS
Range 0.00 to 2.00 mg/L
Resolution 0.01 mg/L
Accuracy ±0.03 mg/L ±3% of reading at 25 °C
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 132.
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.
# 1
# 1
# 2
10 mL10 mL
2 mL
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