Sodium diffusion in cured pork determined by (22)Na radiology

Area of Science:

• Food Science
• Nuclear Chemistry
• Materials Science

Background:

• Understanding salt diffusion in meat is crucial for food processing, preservation, and quality.
• Existing methods for measuring salt diffusion can be destructive or lack precision.

Purpose of the Study:

• To develop and validate a non-destructive method using radioactive sodium-22 ((22)Na) for studying sodium chloride (NaCl) diffusion in meat.
• To determine sodium diffusion coefficients in meat and assess the method's feasibility for future research.

Main Methods:

• A (22)Na radioisotope tracer was employed in a non-destructive approach.
• Scanning a cylindrical meat sample with diffusion from one end generated sodium diffusion profiles.
• Autoradiography was used to validate experimental setups and diffusion profiles.

Main Results:

• Reliable sodium diffusion profiles were obtained, yielding diffusion coefficients of 5-7×10(-10)m(2)/s at 21°C.
• Diffusion profiles exhibited a wall effect, but this did not impede consistent diffusion coefficient determination.
• Results suggest that salt diffusion in meat may be influenced by individual animal factors.

Conclusions:

• The developed (22)Na radioisotope method is a promising, non-destructive technique for studying salt diffusion in meat.
• The method allows for accurate measurement of diffusion coefficients and validation of experimental designs.
• This study is the first to utilize (22)Na for NaCl diffusion in meat, opening new avenues for research.