Oxygen Consumption Analysis

Oxygen consumption refers to the amount of oxidant consumed when treating water samples with strong oxidants (such as potassium permanganate) under certain conditions (acidic or alkaline conditions). It is an important conventional test index in water quality testing and can reflect the degree of organic pollution in water.

Oxygen consumption is an important comprehensive indicator of organic pollution in water. The higher its content, the more serious the water is polluted by organic matter, feces and domestic sewage, industrial wastewater. Moreover, in the water with high oxygen consumption, the residual chlorine is easy to disappear after disinfection, and microorganisms are easy to grow and reproduce, which will cause intestinal diseases. Therefore, the detection of water oxygen consumption has a very important significance.

Lifeasible has established various analytical methods to detect the oxygen consumption of water, including potentiometric titration, potassium permanganate titration, continuous flow analysis, and full spectral analysis.

Testing methods

• Potentiometric titration method

Potentiometric titration determines the endpoint of titration according to the potential jump of the titration curve in the process of determining oxygen consumption. Compared with acidic potassium permanganate titration, this method has the advantages of more objective determination criteria, the smaller minimum volume of addition, controllable titration speed, objective endpoint determination, higher sensitivity, precision, and reproducibility of detection, and is conducive to the automatic operation of the instrument, which is convenient for the detection of large quantities of samples.

• Potassium permanganate titration method

Potassium permanganate is a strong oxidizing agent, which can oxidize water-reducing substances. At the same time, potassium permanganate can react with sodium oxalate solution, the reactants will be transformed into standard water sample chemical oxygen consumption solution by potassium permanganate excess drop into the solution. And according to the different principles of measuring samples, the method is divided into acidic potassium permanganate titration and alkaline potassium permanganate titration method.

• Continuous flow analysis method

Lifeasible has established a continuous flow analysis-acidic potassium permanganate inverse chemical method for the determination of oxygen consumption in water. The optimized selection of potassium permanganate concentration, sulfuric acid concentration, chloride and metal ion interference under constant electric heating temperature makes our established method easy to operate, fast analysis, high precision, and good reproducibility.

• Full spectral analysis method

The optical method has many advantages in the actual monitoring of water oxygen consumption, mainly including no consumption of reagents, high accuracy of the final monitoring results, and relatively fast analysis speed. Since most of the organic substances can be effectively absorbed in the UV (ultraviolet) band from 200 nm to 400 nm, Lifeasible can use full-spectrum analysis to accurately grasp the specific organic content of water samples, so that the water samples can be effectively analyzed and monitored.

Lifeasible has developed a variety of analytical methods to test oxygen consumption to help you monitor the degree of contamination of water. If you have any testing needs, please feel free to contact our staff for solutions. We are available 24/7 at your service.