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Home-Canned Smoked Fish: A New Processing Recommendation.
Carolyn A Raab1, Kenneth S Hilderbrand1
1Oregon State University Extension Service, Corvallis, Oregon 97331-5106.
Journal of Food Protection
|May 23, 2019
Summary
Home canning of smoked fish requires careful consideration of moisture content and jar fill to eliminate Clostridium-botulinum spores. New recommendations ensure safety by accounting for drier fish packed tightly in glass jars.
Area of Science:
- Food Science
- Microbiology
- Food Preservation
Background:
- Smoked fish exhibits variable moisture content, impacting the safety of home canning processes.
- Effective elimination of Clostridium-botulinum spores necessitates precise canning parameters.
- Current home canning guidelines may not adequately address the risks associated with smoked fish variability.
Purpose of the Study:
- To determine optimal home canning procedures for smoked fish.
- To establish safe processing times that account for varying moisture levels and packing densities.
- To mitigate the risk of Clostridium-botulinum spore survival in home-canned smoked fish.
Main Methods:
- Pale chum salmon were smoked to achieve three distinct moisture loss levels (10%, 20%, 30%).
- Smoked fish were canned using standard household techniques in glass jars.
- Thermocouples were used to collect heat penetration data, identifying slowest-heating conditions.
Main Results:
- The slowest heat penetration occurred in jars containing drier smoked fish that were packed tightly.
- These 'worst-case scenario' conditions were identified as critical for establishing safe processing times.
- A processing time of 110 minutes was determined to be sufficient under the tested conditions.
Conclusions:
- A revised recommendation of 110 minutes is proposed for home canning smoked fish in pint jars at sea level.
- This recommendation addresses the critical factors of moisture content and jar fill for effective spore inactivation.
- Adherence to these updated guidelines enhances the safety of home-canned smoked fish products.
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