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Freshline® Modified Atmosphere Packaging (MAP) Gas Selector: find out your optimum gas mix

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Raw Red Meat

Raw Red Meat

Food items: Beef, Goat, Hare, Horse, Lamb, Pork, Rabbit, Veal, Venison, Wild Boar, other items

Recommended gas mixtures

70-80% O2
20-30% CO2
Wild Boar
80% O2
20% CO2
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The gases and mixtures listed above are for general guidance. To identify the optimum gas for your product and process, we recommend you undertake a product trial, with the help of an Air Products MAP gas specialist. If you would like a specialist to contact you to discuss this more click here.

Storage temperature
Legal maximum*: 8° C
Recommended: -1° C to + 2° C

Achievable shelf-life
In air:
2-4 days
5-8 days

Principle spoilage organisms and mechanics
Pseudomonas species (in air), Brochothrix species, Lactic acid bacteria, Micrococci, Enterobacteriaceae, yeasts and moulds.

Food poisoning hazards include
Clostridium species, Salmonella species, Staphylococcus aureus, Bacillus species, Listeria monocytogenes, E.coli and E.coli 0157. Yersinia enterocolitica can be important for pork.

Typical MAP machines
TFFS – Thermoform-fill-seal
PTLF – Preformed tray and lidding film

Typical types of package
Retail: Tray and lidding film

Examples of typical MAP materials

Lidding and/or pillow pack film:

Raw MeatThe two principal spoilage mechanisms affecting the shelf-life of raw red meats are microbial growth and oxidation of the red oxymyoglobin pigment.

When red meat is kept under proper chilled conditions, the controlling influence on the shelflife of the product is the rate of oxidation of the red oxymyoglobin pigment to its brown oxidised form, metmyoglobin. For this reason, high concentrations of O2 are necessary for the MAP of red meats in order to maintain the desirable bright red colour for a longer period. Highly pigmented red meats, such as venison and wild boar, require higher concentrations of O2.

Aerobic spoilage bacteria, such as Pseudomonas species, which are normally predominant on red meats are inhibited by CO2. Consequently, to create the dual effect of red colour stability and microbial inhibition, gas mixtures containing 20-30% CO2 and 70-80% O2 are recommended for extending the chilled shelf-life of red meats from 2-4 days to 5-8 days and even longer. A gas/product ratio of 2:1 is often recommended. The maintenance of recommended chilled temperatures and good hygiene and handling throughout the butchery, MAP, distribution and retailing chain is also of vital importance in ensuring the safety and extended shelf-life of red meat products.

Red meats provide an ideal medium for the growth of a wide range of spoilage and food poisoning micro-organisms. It should be noted that raw red meats are subsequently cooked before consumption and thorough heating is sufficient to kill the vegetative cells of food poisoning bacteria. Consequently, the risk of food poisoning is greatly minimised by proper cooking.

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* The Food Safety (Temperature Control) regulations 1995 states that the maximum Storage temperature for chilled perishable foods is 8C. There will be flexibility to vary this when scientifically justified. For legal temperature storage requirements, please contact the Campden and Chorleywood Food Research Association.