Electromagnetic characterization of cola drinks

The electromagnetic characterization of liquids could be of great interest to manufacturing companies, as it could provide information about the quality of beverages. They could use this knowledge to optimize production processes. Using the probe reflection system, dielectric properties of different varieties of Coca-Cola and Pepsi products in cans have been examined. Measurements have been performed at several temperatures between 0 and 60 degrees Celsius and at periods after opening of 0, 6, 24 and 48 h. The applied frequency range goes from 0 to 20 GHz in steps of 200 Hz. Both experimental and theoretical approaches have been used to model the results. Although all varieties follow the same trend, the results clearly show that differences exist in the electromagnetic behavior of the two brands and of the different varieties.