The HI3843 is a chemical test kit that measures hypochlorite by iodometric titration. The HI3843 is supplied complete with all of the reagents and equipment necessary to perform approximately 100 tests.
Complete setup
All required materials are included with the test kit, such as the sample beaker, indicator and reagent bottles, spoon, and plastic pipettes.
High resolution
Readings from 0.00 to 2.00 mg/L are determined to 0.25 mg/L resolution.
Readings from 0.0 to 10.0 mg/L are determined to 1.0 mg/L resolution.
Replacement reagents available
There is no need to buy a new kit when reagents are exhausted. The HI3844-100 can be ordered to replace the reagents supplied with the kit.
In the HI3844 test kit, hydrogen peroxide reacts slowly with iodide in acid solution (Step 1); thus a 15 minute interval is required to allow the reaction to occur completely. The amount of iodine generated is equivalent to the hydrogen peroxide in the sample. The liberated iodine is then titrated with standard sodium thiosulfate solution that reduces the iodine back to iodide ions (Step 2).
Step 1: H2O2 + 2H+ + 2I- → I2 + 2H2O
Step 2: I2 + 2(S2O3)2- → 2I- + (S4O6)2-
| Range | 0.00 to 2.00 mg/L H₂O₂; 0.0 to 10.0 mg/L H₂O₂ |
|---|---|
| Resolution | 0.25 mg/L (0.00 to 2.00 mg/L range); 1.0 mg/L (0.0 to 10.0 mg/L range) |
| Method | iodometric |
| Number of Tests | 100 |
| CTK Type | Titration |
| Ordering Information | HI3844 test kit comes with 100 mL hydrogen peroxide reagent A, 17 g hydrogen peroxide reagent B, 30 mL hydrogen peroxide reagent C, 25 mL hydrogen peroxide reagent D, graduated plastic test tube with cap, 50 mL calibrated plastic vessel, 3 mL plastic pipette, 1 mL plastic pipette and plastic spoon. |
