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SILICASILICA
SILICASILICA
SILICA
SPECIFICATIONS
Range 0.00 to 2.00 mg/L
Resolution 0.01 mg/L
Accuracy ±0.03 mg/L ±3% of reading
Typical EMC ±0.01 mg/L
Deviation
Light Source Tungsten lamp with narrow band interference
filter @ 610 nm
Method Adaptation of the ASTM Manual of Water and
Environmental Technology, D859, Heteropoly Blue
method. The reaction between silica and reagents
causes a blue tint in the sample.
REQUIRED REAGENTS
Code Description Quantity
HI 93705A-0 Molybdate 6 drops
HI 93705B-0 Citric acid 1 packet
HI 93705C-0 Amino acid 1 packet
REAGENT SETS
HI 93705-01 Reagents for 100 tests
HI 93705-03 Reagents for 300 tests
For other accessories see page 141.
MEASUREMENT PROCEDURE
• Select the program number corresponding to Silica on the
secondary LCD by pressing PROGRAM W and V.
• Fill the cuvet with 10 mL of unreacted sample (up to
the mark).
• Add 6 drops of HI 93705A Molybdate
reagent. Replace the cap and swirl
the solution.
• Wait for 4 minutes, add the content
of one packet of HI 93705B Citric
acid reagent and shake until it is
completely dissolved.
Silica
10 mL
x 6
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