Naslov
Microbial decontamination of cosmetic raw materials and personal care products by irradiation

Autori
Katušin-Ražem, Branka ; Mihaljević, Branka ; Ražem, Dušan

Izvornik
Radiation Physics and Chemistry (0969-806X) 66 (2003); 309-316

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Comsetic raw materials; Irradiation decontamination; Microbiological contamination; Personal care products; Radiosensitivity
(Cosmetic raw materials; Irradiation decontamination; Microbiological contamination; Personal care products; Radiosensitivity)

Sažetak
Typical levels of sporadically occurring (dynamic) microbial contamination of cosmetic raw materials: pigments, abrasives and liposomes, as well as of final products for personal care: toothpaste, crayons, shampoos, cleansers and creams, were evaluated. In most cases the contamination was dominated by a single population of microorganisms, either Gram-negative bacteria or molds. The feasibility of microbial decontamination by irradiation was studied by determining the resistance to gamma radiation of contaminating microflora in situ. It was expressed as a dose required for the first 90% reduction, D_first 90% red. The values in the range 1-2 kGy for molds and 0.1-0.6 kGy for Gram-negative bacteria were obtained. This relatively high susceptibility to irradiation allowed inactivation factors close to 6 to be achieved with doses genrally not exceeding 3 kGy, and yielding endpoint contamination less than 10/g.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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