HI38434 Pool Line Bleach Test Kit is used to determine the concentration of sodium hypochlorite (bleach) that is added to swimming pools, hot tubs and spas. This test kit can measure from 50 g/L (5%) to 150 g/L (15%).
- Supplied with enough reagents to measure up to 100 tests on average
- Wide range up to 150 g/L (15%) Chlorine (Cl2)
- Iodometric drop type titration method
Available chlorine refers to chlorine liberated by the action of dilute acids on hypochlorite:
OCl– + Cl– + 2H+ = Cl2 + H2O
HI38434 uses an iodometric titration method. First, the hypochlorite solution is treated with potassium iodide and acidified with a strong acid. The amount of iodine generated is equivalent to the chlorine in the sample. The next step is to determine the concentration of iodine by the titration with thiosulfate to reduce the iodine back to iodide ions. The amount of thiosulfate added is then used to calculate the amount of chlorine that was in the original sample.