The HI3810 is a chemical test kit that measures dissolved oxygen by modified Winkler titration. The HI3810 is supplied complete with all of the reagents and equipment necessary to perform approximately 110 tests.
The concentration of dissolved oxygen in water is extremely important in nature as well in man’s environment. In oceans, lakes, rivers, and other surface water bodies, dissolved oxygen is essential to the growth and development of aquatic life. Without oxygen, water can become toxic due to the anaerobic decaying of organic matter. In man’s environment, water must contain at least 2 mg/L of oxygen to protect water pipes from corrosion. However, boiler system water, in many cases, cannot contain greater than 10 mg/L oxygen.
A modified Winkler method is used in the HI3810 test kit. Manganous ions react with oxygen in the presence of potassium hydroxide to form a manganese oxide precipitate (Step 1). An azide is present to prevent any nitrite ions from interfering with the test. With addition of acid, manganese oxide hydroxide oxidizes the iodide to iodine (Step 2). Since the amount of iodine generated is equivalent to the oxygen in the sample, the concentration of iodine is calculated by titration of thiosulfate ions that reduce the iodine back to iodide ions (Step 3).
Step 1: 2Mn2+ + O2 + 4OH– → 2MnO(OH)2
Step 2: MnO(OH)2 + 2I– + 4H+ → Mn2+ + I2 + 3H2O
Step 3: I2 + 2S2O32- → 2I– + S4O62-
| Weight | 0.7 kg |
|---|---|
| Parameter | Dissolved, Oxygen |
| SKU | HI3810 |
| Name | Dissolved Oxygen Chemical Test Kit – HI3810 |
| Dissolved Oxygen Measurement Type | Titration |
| Dissolved Oxygen Range | 0.0 to 10.0 mg/L O₂ |
| Dissolved Oxygen Resolution | 0.1 m/L |
| Dissolved Oxygen Measurement Method | modified Winkler |
| Dissolved Oxygen Number of Test | 110 |
| Weight | 910 g (34.0 oz.) |
| Dimensions | 260x120x60 mm (10.2×4.7×2.4 in.) |
HI3810 test kit comes with 30 mL manganous sulfate solution, 30 mL alkali-azide reagent, 60 mL sulfuric acid solution (2), 10 mL starch indicator, 120 mL titrant solution, glass bottle with stopper, 10 mL calibrated vessel, and calibrated syringe with tip.
To empower customers to achieve quality
by supplying intuitive, accurate, and reliable analytical instruments with exceptional customer service and value.
We take pride in every product we build. From an original idea, to a completed product ready for testing. We oversee every aspect of the manufacturing process. It is this level of attention to detail that sets us apart.
To empower customers to achieve quality by supplying intuitive, accurate, and reliable analytical instruments with exceptional customer service and value.
We take pride in every product we build. From an original idea, to a completed product ready for testing. We oversee every aspect of the manufacturing process. It is this level of attention to detail that sets us apart.
To empower customers to achieve quality by supplying intuitive, accurate, and reliable analytical instruments with exceptional customer service and value.
We take pride in every product we build. From an original idea, to a completed product ready for testing. We oversee every aspect of the manufacturing process. It is this level of attention to detail that sets us apart.
