* 1 gpg = 17 ppm CaCO¦ HI3844 à HI38444 Hydrogen Peroxide Test Kit The HI3844 and HI38444 (Pool Line) are titration-based chemical test kits that determine the hydrogen peroxide concentration in two ranges: 0.00 to 2.00 mg/L and 0.0 to 10.0 mg/L. These test kits are supplied with all of the necessary reagents and equipment to perform the analysis. The test kit contains enough reagents for 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 kits. Signicance of Use Hydrogen peroxide (H«O«) is widely used as a disinfectant and as a bleach for textiles, wood pulp, and hair, just to name a few. It is also used as a substitute for chlorine in water and sewage treatment. Most common commercial forms are aqueous solutions containing about 6, 12 and 30% hydrogen peroxide and are referred to as "20-volume," "40-volume," and "100-volume" respectively, referring to the value of oxygen liberated when the solution is boiled. The Hanna test kit can quickly and easily determine concentration in water up to 10 mg/L of hydrogen peroxide. This is due to the fact that it is not aected by stabilizers, which are sometimes added to commercial hydrogen peroxide solutions. In both the HI3844 and HI38444 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: H«O« + 2H + + 2I¯ → I« + 2H«O Step 2: I« + 2(S«O¦)¯²→ 2I¯ + (S¬OÅ)¯² Specifications HI3844 Hydrogen Peroxide (as H«O«) HI38444 Hydrogen Peroxide (as H«O«) Type titration Range 0.00-2.00 mg/L (ppm); 0.0-10.0 mg/L (ppm) Smallest Increment 0.25 mg/L (ppm); 1.0 mg/L (ppm) Method iodometric Number of Tests 100 avg. Ordering Information HI3844 andHI38444 (Pool Line) test kits come 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. Reagent HI3844-100 hydrogen peroxide, 100 tests avg. HI3843 à HI38434 Bleach Test Kit The HI3843 and HI38434 (Pool Line) are titration-based chemical test kits that determine the hypochlorite concentration within the 50 to 150 g/L Cl« range. These test kits are supplied with all of the necessary reagents and equipment to perform the analysis. The test kit contains enough reagents for perform approximately 100 tests. • Complete setup · All required materials are included with the test kit, such as the Erlenmeyer flask, indicator and reagent bottles and packets, and plastic pipettes. • High resolution · Readings from 50 to 150 g/L are determined to 5 g/L resolution. • Replacement reagents available · There is no need to buy a new kit when reagents are exhausted. The HI3843-100 can be ordered to replace the reagents supplied with the kit. Signicance of Use Hypochlorites are common bleaching agents used to whiten textiles and paper and to disinfect solutions. Sodium hypochlorite solution has been traditionally used for the treatment of pool water since it is an inexpensive and readily available form of chlorine. The solution usually contains 10 to 15% available chlorine (equivalent to 100 to 150 g/L), but it rapidly loses its strength during storage. In addition, since it is greatly aected by heat, light, pH, and heavy metals, it needs to be monitored regularly. An iodometric titration method is used in the HI3843 test kit. The hypochlorite solution is treated with potassium iodide and strongly acidied with acid (Step 1). The amount of iodine generated is equivalent to the chlorine in the sample. The concentration of iodine is then calculated by titration of thiosulfate ions that reduce the iodine back to iodide ions (Step 2). Step 1: OCl¯ + 2H + + 2I¯ → Cl¯ + I« + H«O Step 2: I« + 2(S«O¦)¯Æ → 2I¯ + (S¬OÅ)¯² Specifications HI3843 Hypochlorite (as Cl«) HI38434 Hypochlorite (as Cl«) Type titration Range 50-150 g/L (ppt) Smallest Increment 5 g/L (ppt) Method iodometric Number of Tests 100 avg. Ordering Information HI3843 and HI38434 (Pool Line) test kits come with 30 mL potassium iodide solution, 100 packets bleach reagent B, 30 mL bleach reagent C (2), 125 mL glass Erlenmeyer flask and 1 mL plastic pipettes (25). Reagent HI3843-100 hypochlorite (bleach), 100 tests avg. Chemical test kit reagents begin on page 9.44 9 Chemical Test Kits 9.22 | www.hannainst.com
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