:: Volume 3, Number 4 (Fall 2016) ::
IAHS 2016, 3(4): 195-200 Back to browse issues page
Comparing effects of in-home decontamination procedures by common components on antioxidant activity and microbial load in some selected vegetables
M. Alimohammadi *1, N. Farajvand2, A. Kyani2, V. Kazemi Moghaddam3, M. Hadei2
1- PhD Environmental Health Engineering Department, School of Public Health, Tehran University of Medical sciences, Tehran, Iran , m_alimohammadi@tums.ac.ir
2- MSc Environmental Health Engineering Department, School of Public Health, Tehran University of Medical sciences, Tehran, Iran
3- MSc Environmental Health Engineering Department, School of Public Health, Neyshabur University of Medical Sciences, Neyshabur, Iran
Abstract:   (628 Views)

Aims: Decontamination procedures are different in each country, as the other applications of disinfection, and standards. The aim of this study was to evaluate the effects of household decontaminations and storage time on the antioxidant activity and microbial load of salad vegetables.

Instrument & Methods: This analytic-descriptive study was conducted on 4 types of salad vegetables; cucumber, tomato, lettuce, and sweet basil. After washing, samples with storage time of 0 day were analyzed immediately. Other samples were held in 4°C for 3 and 5 days. Five different washing and decontamination methods were compared; water washing, detergent washing, benzalkonium chloride, sequential washing and Kanz disinfecting method. The Ferric Reducing Ability of Plasma assay was used to measure the antioxidant activity. Aerobic mesophyll bacteria and total coliforms were chosen as microbial load index. ANOVA and Tukey post-hoc tests were used to analyze the data.

Findings: By increasing the storage time, the antioxidant activity of all types of vegetables reduced. There was a significant decrease in antioxidant activity in all types of vegetables using sequential washing method with water, detergent, and benzalkonium chloride and Kanz disinfection method. All washing methods were effective in decontamination for either mesophyll bacteria or total coliforms, except for total coliforms in lettuce. There was no significant difference in microbial load among first 4 methods of washing (p>0.05), but a significant difference was observed in Kanz disinfection method (p<0.05).

Conclusion: Kanz disinfection is the most effective decontamination method to eliminate microorganisms index, which also reduce the antioxidant activity.

Keywords: Vegetables, Antioxidants, Decontamination, Colony Count, Microbial, Detergents
Full-Text [PDF 217 kb]   (345 Downloads)    
Article Type: Original Research | Subject: Food Security
Received: 2016/12/13 | Accepted: 2017/02/4 | Published: 2017/03/1
* Corresponding Author Address: Environmental Health Engineering Department, School of Public Health, Tehran University of Medical Sciences, Pursina Street, Qods Street, Enghelab Avenue, Tehran, Iran



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Volume 3, Number 4 (Fall 2016) Back to browse issues page