103
8.29. HARDNESS, TOTAL HIGH RANGE
SPECIFICATIONS
Range 400 to 750 mg/L (as CaCO
3
)
Resolution 1 mg/L
Accuracy ±10 mg/L ±2% of reading at 25 °C
Light Source LED with narrow band interference filter @ 466 nm
Method Adaptation of the EPA recommended method 130.1.
REQUIRED REAGENTS
Code Description Quantity
HI93735IND‑0 Hardness Indicator Reagent 0.5 mL
HI93735A‑HR Hardness High Range Reagent A 9 mL
HI93735B‑0 Hardness Buffer Reagent B 2 drops
HI93735C‑0 Fixing Reagent 1 packet
REAGENT SETS
HI93735‑02 Reagents for 100 tests (HR, 400 to 750 mg/L)
HI93735‑0 Reagents for 300 tests (LR ‑ 100 tests, MR ‑ 100 tests, HR ‑ 100 tests)
For other accessories see page 200.
MEASUREMENT PROCEDURE
• Select the Total Hardness HR method using the procedure
described in the Method Selection section (see page 18).
• Add 0.5 mL of unreacted sample to the cuvette. Add
0.5 mL of HI93735IND‑0 Hardness Indicator Reagent.
• With the plastic dropper fill the cuvette up to the 10 mL
mark with HI93735A‑HR Hardness High Range Reagent A.
• Add two drops of HI93735B‑0 Hardness Buffer
Reagent B. Replace the cap and invert 5 times to mix.
HARDNESS, TOTAL HIGH RANGE
To Next Page
Loading...
