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Dissolved Oxygen Chemical Test Kit Replacement Reagents (100 tests) - HI3810-100

The HI3810-100 are reagents for the determination of dissolved oxygen (O2) by titration with the HI3810 Dissolved Oxygen Chemical Test Kit. There are enough reagents for approximately 100 tests to be used with Hanna’s test kit. These high quality reagents are manufactured in our state-of-the-art facility and are clearly marked with the lot number and expiration date on each packet for traceability.

  • Pre-made reagents for ease of use
  • Prepared with high purity chemicals
  • Marked with expiration date and lot number for traceability


The HI3810-100 are high quality reagents that are pre-measured, allowing for users to achieve fast and accurate dissolved oxygen measurements with the chemical test kit. These reagents follow a modified Winkler titration method to determine dissolved oxygen concentration.

For determination of dissolved oxygen, manganous ions react with oxygen in the presence of potassium hydroxide to form a manganese oxide precipitate. 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. 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. The color change from blue to colorless indicates the endpoint of the titration. The number of milliliters of titrant used to reach the appropriate endpoint will determine the dissolved oxygen concentration as mg/L O2. These reagents are designed to be used with samples that have an expected dissolved oxygen range of 0.0 to 10.0 mg/L O2.

Additional information

Weight 0.47 kg

Dissolved, Oxygen


SKU HI3810-100
Name Dissolved Oxygen Chemical Test Kit Replacement Reagents (100 tests) – HI3810-100
Package bottles
Quantity 100 tests
Method modified Winkler


Dissolved Oxygen Chemical Test Kit Replacement Reagents (100 tests) – HI3810-100