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Packaging Material Oxygen Permeability Testing for Bottled Soft Drinks Freshness

The quality and shelf life of beverages, particularly fruit juices and teas, are significantly influenced by the packaging material's ability to resist oxygen permeation. PET (Polyethylene Terephthalate) bottles, a common choice for beverage packaging, are susceptible to oxygen ingress, which can lead to a host of quality issues, including:
  • Oxidation: Oxygen can react with the vitamins, pigments, and other components of the beverage, leading to color changes, loss of flavor, and reduced nutritional value.
  • žMicrobial Growth: Oxygen can create an environment conducive to microbial growth, compromising the safety and freshness of the product.
  • Off-Flavors: Oxidation can produce off-flavors and odors that can negatively impact the consumer experience.


To mitigate these issues, it is crucial to assess the oxygen permeability of PET bottles before they are used for packaging. Oxygen permeability testing measures the rate at which oxygen molecules pass through a material. This information is essential for selecting appropriate packaging materials and optimizing packaging designs. A common method for testing the oxygen permeability of PET bottles is the equal pressure method. In this method, a sample of the material is placed between two chambers. One chamber is filled with a gas mixture containing a known concentration of oxygen, while the other chamber is filled with a gas mixture with a lower oxygen concentration. The rate at which oxygen diffuses through the material is measured by monitoring the change in oxygen concentration in the low-oxygen chamber.


Labthink C230H Oxygen Transmission Rate Test System is a state-of-the-art instrument designed to perform precise oxygen permeability tests on a wide range of materials, including PET bottles, films, sheets, and packaging components. This system utilizes a coulometric oxygen sensor and the equal pressure method to determine the oxygen transmission rate (OTR) of the material.

Key Benefits of Oxygen Permeability Testing

  • žProduct Quality: Ensures that the product remains fresh, flavorful, and nutritious.
  • Shelf Life Extension: Helps to extend the product's shelf life by minimizing oxidation and microbial growth.
  • žCost Reduction: Reduces product waste and recalls due to quality issues.
  • žRegulatory Compliance: Helps to meet regulatory standards and consumer expectations.
By prioritizing oxygen permeability testing, manufacturers can safeguard the quality of their beverage products and maintain consumer trust.

As the demand for functional packaging materials grows, testing methods are evolving to ensure a more comprehensive evaluation of packaging films. Labthink encourages collaboration with packaging industry companies for quality control! Visit the website www.labthink.com to learn more!
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