CHEMISTRY CALCULATORS
Chemical Oxygen Demand (COD) Calculator
Effortlessly calculate the chemical oxygen demand of water samples for environmental analysis.
What is the Chemical Oxygen Demand (COD) Calculator & How does it work?
Chemical Oxygen Demand (COD) is a measure of the amount of oxygen required to break down organic matter in water under controlled conditions. It is an important parameter in assessing water quality and pollution levels.
The COD test involves oxidizing organic compounds in water using a strong oxidizing agent, typically potassium dichromate (K2Cr2O7). The amount of oxygen consumed is proportional to the concentration of organic matter.
The COD test involves oxidizing organic compounds in water using a strong oxidizing agent, typically potassium dichromate (K2Cr2O7). The amount of oxygen consumed is proportional to the concentration of organic matter.
COD = \frac{V_{\text{K}} \times C_{\text{Cr}}}{V_{\text{s}}}
VK = Volume of potassium dichromate solution used (mL)
CCr = Concentration of potassium dichromate (mg/L)
Vs = Sample volume (mL)
CCr = Concentration of potassium dichromate (mg/L)
Vs = Sample volume (mL)
Parameters
Result—
Results are for informational purposes only and do not constitute professional advice.