Introduction

Oxygen transmission rate (OTR) is a critical parameter in evaluating the barrier properties of packaging materials, 

particularly for food, pharmaceuticals, and other oxygen-sensitive products. ASTM F1307 is a standardized test method 

that measures the oxygen transmission rate (OTR) through dry packages using coulombic (electrochemical) sensors. 

This method is widely used in industries where precise oxygen barrier performance is essential for product shelf life

 and quality preservation.

Testing instrument：OTR-D3 Oxygen Permeability Tester (Coulometry)

Scope and Purpose of ASTM F1307

ASTM F1307, titled "Standard Test Method for Oxygen Transmission Rate Through Dry Packages Using a Coulombimetric 

Sensor," provides a reliable and accurate way to determine how much oxygen passes through a packaging material over

 time. This test is particularly useful for:

Flexible and rigid packaging films

Medical packaging (e.g., sterile barrier systems)

Food packaging (e.g., modified atmosphere packaging)

Pharmaceutical blister packs and pouches

The method is designed for dry conditions, meaning it does not account for moisture effects, which are covered under 

other standards like ASTM D3985 (for films) or ASTM F1927 (for humid conditions).

Key Principles of the Test Method

The test relies on coulombic (electrochemical) oxygen sensors, which provide high sensitivity and accuracy in measuring

 oxygen permeation. The basic procedure involves:

Sealing the Test Specimen – The packaging material is mounted in a diffusion cell, separating two chambers: one with a 

controlled oxygen supply (usually 100% O₂) and the other with an oxygen-free carrier gas (e.g., nitrogen).

Oxygen Permeation – Oxygen molecules that permeate through the material are carried by the nitrogen stream to the 

coulombic sensor.

Electrochemical Detection – The sensor generates an electrical current proportional to the oxygen concentration, 

allowing precise OTR calculation.

Test Conditions and Requirements

To ensure consistency, ASTM F1307 specifies:

Temperature: Typically 23°C (73°F), but can be adjusted for real-world conditions.

Humidity: The test is conducted under dry conditions (0% RH unless otherwise specified).

Test Duration: Until a steady-state oxygen transmission rate is achieved.

Calibration: The coulombic sensor must be calibrated using certified reference gases.

Conclusion

ASTM F1307 provides a precise and repeatable method for measuring oxygen transmission rates in dry packaging using 

coulombic sensors. Its accuracy and reliability make it essential for industries requiring stringent oxygen barrier 

performance. By following this standard, manufacturers can ensure their packaging meets quality and regulatory 

requirements, ultimately protecting product integrity.