Scientific journal

60 2021

Journal of Food and Nutrition Research
Summary No. 2 / 2021

Irkin, R. – Carikci, S. – Akalin, S. – Batu, Z.
Decontamination effects of lemon peel and mint leaf extracts on salad vegetables
Journal of Food and Nutrition Research, 60, 2021, No. 2, s. 146-152

Reyhan Irkin, Nutrition and Dietetics Department, Health Sciences Faculty, Izmir Democracy University, 13. Str., N:2, 35140 Izmir, Turkey. Tel: +90 232 260 1001-703, Fax: +90 232 260 1004. E-mail : reyhan.irkin@idu.edu.tr; rirkin@hotmail.com

Received 13 February 2021; 1st revised 3 May 2021; accepted 31 May 2021; published online 12 June 2021.

Summary: Salad vegetables are rich in vitamins, minerals and fibre. However, some food-borne diseases are associated with the consumption of this type of raw food. Effective disinfection processes are therefore important to obtain it microbiologically safe for consumption. This study aimed to evaluate the antimicrobial properties of the essential oils and extracts of fresh lemon (Citrus lemon L.) peel as well as fresh and dried mint (Mentha spicata L.) leaves on certain bacteria asso­ciated with salad vegetables. Lemon peel and mint extracts used for the disinfection process were obtained by the Soxhlet extraction method while their essential oil was obtained by hydrodistillation using a Clevenger-type apparatus. Study results showed that the most effective disinfectant regarding total microbial counts was mint essential oil with a reduction of 7.56 log CFU·g-1. For Escherichia coli ATCC 25933, lemon peel Clevenger extract was determined to be the most effective with a reduction of 7.37 log CFU·g-1. The disinfectant applications statistically significantly reduced total microbial counts on salad vegetables (p < 0.05). The results of the study suggested that natural extracts and/or essential oils can be used as effective disinfectants.

Keywords: Escherichia coli; disinfectant; antimicrobial; essential oil

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