Efficiency of Treatments Involving Ultraviolet Irradiation for Decontaminating Packaging Board of Different Surface Compositions.

Reflectivity, smoothness and geometry of several types of food packaging board were studied in relation to the effectiveness of decontamination treatments involving ultraviolet (UV-C, 254 nm) irradiation. Surfaces containing aluminum in the laminate reflected more light in the 325 to 550 nm range and showed a lower lethal effect when Bacillus subtilis spores were irradiated. Visible light of wavelengths between 325 and 550 nm is known to cause photoreactivation of UV damage in vegetative cells.

Measurement of Residual Hydrogen Peroxide in Preformed Food Cartons Decontaminated with Hydrogen Peroxide and Ultraviolet Irradiation.

A luminometric method was used to determine the levels of residual hydrogen peroxide present in preformed food packaging cartons after a decontamination process using sterile distilled water or 0.1, 1.0 or 30% (wt/vol) hydrogen peroxide and ultraviolet (UV-C, 254 nm) irradiation.

Combined Treatment with Hydrogen Peroxide and Ultra-violet Irradiation to Reduce Microbial Contamination Levels in Pre-formed Food Packaging Cartons.

A treatment combining hydrogen peroxide and ultra-violet (UV-C) irradiation was assessed for reduction of microbial contamination in pre-formed food packaging cartons. There was a synergistic effect between low concentrations (0 - 5% wt/vol) of hydrogen peroxide and UV-C irradiation (10 s) on spores of Bacillus subtilis , the maximum lethality occurring between 0.5 and 1% peroxide.