In the world of oxygen permeation testing of packaging materials, not all instruments are created equal. This is why ASTM approved two distinct test methods for determining oxygen transmission rates of packaging materials: ASTM D3985 – 05 (Reapproved 2010) – “Standard Test Method for Oxygen Gas Transmission Rate Through Plastic Film and Sheeting Using a Coulometric Sensor”, and ASTM F2622 – 08 – Standard Test Method for Oxygen Gas Transmission Rate Through Plastic Film and Sheeting Using Various Sensors. This white paper explains the difference between these two methods and discusses when either method could be used, and when one method would be better than the other.
Oxygen adversely impacts the shelf life of many foods by causing oxidation, bacteria growth, and other changes in quality. To protect the product’s quality, oxygen barrier packaging materials are used. Consequently, accurate Oxygen Transmission Rate (OTR) measurement is important when assessing oxygen barrier properties during the selection of packaging materials.
Sensor technology is critical to obtaining accurate, repeatable and reliable OTR results from which important commercial and quality control decisions are made.