Assessment of microbiological contamination in saengshik products from the Korean market and identification of the irradiation status

作者：Kim Gui-Ran; Shahbaz Hafiz Muhammad; Kyung Hyun-Kyu; Kwon Joong-Ho^*

来源：Food Science and Biotechnology, 2018, 27(2): 607-615.

DOI：10.1007/s10068-017-0273-1

• Saengshik
• Microbial safety
• Food irradiation
• Photostimulated luminescence
• Thermoluminescence

This study investigated the prevalence of microbiological contamination in commercial Saengshik products (samples SP-1 to SP-12) from the Korean market, and identified their irradiation status. SP-2, SP-8, and SP-12 showed less than 3.66 and 1.10 log colony forming units (CFU)/g in total plate and coliforms counts, respectively, while the remaining samples showed more than 4.70 and 2.35 log CFU/g, respectively. Four samples were positive on some of foodborne pathogenic bacteria (Clostridium perfringens, Escherichia coli O157:H7, and Bacillus cereus). SP-2, SP-8, and SP-12 contained no pathogenic bacteria and were suspected to have been irradiated. They were confirmed as positive using photostimulated luminescence (PSL) analysis. PSL positive results on samples SP-2, SP-8 and SP-12 were finally confirmed by the authentic thermoluminescence (TL) analysis on the basis of TL glow curve shape, intensity, temperature range of TL peak maxima and TL ratio (TL1/TL2).

• 出版日期2018-4