175
8.56. SILICA HIGH RANGE
SPECIFICATIONS
Range
0 to 200 mg/L (as SiO
2
)
Resolution
1 mg/L
Accuracy
±1 mg/L ±5% of reading at 25 °C
Light Source
LED with narrow band interference filter @ 466 nm
Method
Adaptation of the USEPA Method 370.1 for drinking, surface and saline
waters, domestic and industrial wastes and Standard Method 4500‑SiO
2
.
REQUIRED REAGENTS
Code
Description Quantity
HI96770A‑0
Silica High Range Reagent A
1 packet
HI96770B‑0
Silica High Range Reagent B
1 packet
HI96770C‑0
Silica High Range Reagent C
1 packet
REAGENT SETS
HI96770‑01
Reagents for 100 tests
HI96770‑03
Reagents for 300 tests
For other accessories see page 200.
MEASUREMENT PROCEDURE
• Select the
Silica HR
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)
and replace the cap.
• Place the cuvette into the holder and close the lid.
• Press the
Zero
key. The display will show “‑0.0‑” when the meter is zeroed and ready for
measurement.
10 mL
SILICA HIGH RANGE