172
8.55. SILICA LOW RANGE
SPECIFICATIONS
Range 0.00 to 2.00 mg/L (as SiO
2
)
Resolution 0.01 mg/L
Accuracy ±0.03 mg/L ±3% of reading at 25 °C
Light Source LED with narrow band interference filter @ 610 nm
Method Adaptation of the ASTM Manual of Water and Environmental Technology,
D859, Heteropoly Molybdenum Blue method.
REQUIRED REAGENTS
Code Description Quantity
HI93705A‑0 Silica Low Range Reagent A 6 drops
HI93705B‑0 Silica Low Range Reagent B 1 packet
HI93705C‑0 Silica Low Range Reagent C 1 packet
REAGENT SETS
HI93705‑01 Reagents for 100 tests
HI93705‑03 Reagents for 300 tests
For other accessories see page 200.
MEASUREMENT PROCEDURE
• Select the Silica LR method using the procedure described
in the Method Selection section (see page 18).
• Fill the cuvette with 10 mL of unreacted sample
(up to the mark).
• Add 6 drops of HI93705A‑0 Silica Low Range
Reagent A. Replace the cap and swirl the solution.
• Press Timer and the display will show the
countdown prior to adding HI93705B‑0 Silica Low
Range Reagent B, or alternatively wait 4 minutes.
• Add one packet of HI93705B‑0 Silica Low Range
Reagent B and shake until it is completely dissolved.
• Press Continue and the display will show the countdown,
or alternatively wait 1 minute.
10 mL
SILICA LOW RANGE
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