Plasma-activated water must prove hygiene gains without sacrificing fresh-meat appearance

Plasma-activated water is being investigated as a surface-decontamination tool that could complement conventional processes for fresh meat. A study from the University of Veterinary Medicine Hannover, published on 20 October, examined TRIS-buffered plasma-activated water in beef and buffalo samples. Its design did not stop at pathogen reduction: it also considered perceptible colour changes, myoglobin variants and sensory effects at the meat surface.

That approach matters. A hygiene intervention is only useful to the chain if it does not compromise appearance, aroma or product acceptability. In fresh meat, the surface is at once the microbiological interface, the key zone for colour, and the first quality signal seen by shoppers. A technology that reduces microbial load while visibly altering myoglobin chemistry therefore cannot be judged on safety criteria alone.

The authors present the results as evidence of potential but also point to knowledge gaps in applying plasma-activated liquids. That makes premature conclusions inappropriate. Water composition, buffering system, contact time, cut, initial contamination and packaging can all alter the outcome. Validation needs to take place in the specific product and process, including chilled storage and commercial handling conditions.