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226419

Evaluation of the Sewi dates safety produced by the traditional method

Article

Last updated: 01 Jan 2025

Subjects

-

Tags

Environmental chemistry

Abstract

Sewi dates which is traditionally produced by sun drying at open air are exposed to contamination by various contaminants such as soil particles, dust, pests, birds and other contaminants like heavy metals, aflatoxins and microorganisms. The present work aimed to evaluate the level of heavy metals contamination, and microbial load as well as aflatoxins in Sewi dates samples produced by traditional methods. Thirty samples of Sewi date were collected from different local markets representing ten sites at Giza governorate. The date samples were digested by microwave oven (closed system), then the levels of heavy metals were determined by ICP. Also, microbiological analyses (total bacteria counts and yeasts and molds count) of Sewi date samples were assessed. Also, Levels of aflatoxins were determined by HPLC. The contamination levels of date sample by heavy metals, aflatoxins and microbial counts varied according to sampling location. The results showed that most of the collected date samples had high contamination with heavy metals, aflatoxins and microbes. Some metals such as Pb, Cd and Ni were above the maximum residue limits (MRLs), while As and Hg levels were below the detection limits in all date samples. Total bacterial count in Sewi date ranged from 2.537 to 4.85 Log CFU/g. while, mold and yeasts recorded lower counts that ranged from 2.61 to 3.973 Log CFU/g. In contrast, no coliforms, E. coli and Salmonella were detected in all date samples. The highest detected aflatoxins were AFB1 with 1.09 µg kg-1, while no AFB2 and AFG2 were detected. Finally, it can be concluded that the modification of date's production is necessary to reduce the contamination levels in the Sewi date to obtain the safe food.

DOI

10.21608/ejchem.2022.122952.5501

Keywords

Sewi dates, microbial load, Heavy metals, aflatoxins - contaminants

Authors

First Name

Gomaa

Last Name

Abdel-Rahman

MiddleName

Nour-Eldein

Affiliation

Food Toxicology and Contaminants Dept., National Research Center, Dokki, Cairo, Egypt

Email

gomaa.nrc@gmail.com

City

Giza

Orcid

0000-0002-6193-9033

First Name

Salah

Last Name

Salem

MiddleName

Hamza Elmahdy

Affiliation

Department of Food Toxicology and Contaminants, National Research Centre, Dokki, Cairo, Egypt. P.O. Box: 12622, Dokki, Cairo, Egypt.

Email

salah_n82@yahoo.com

City

Cairo

Orcid

-

First Name

Essam

Last Name

Saleh

MiddleName

Mahmoud

Affiliation

Food Toxicology Depart, National Research Center, Cairo, Egypt

Email

essamsaleh39@gmail.com

City

-

Orcid

-

First Name

Diaa

Last Name

Marrez

MiddleName

Attia

Affiliation

Food toxicology and contaminants Department, National Research Center, Dokki, Cairo, Egypt

Email

diaamm80@hotmail.com

City

Cairo

Orcid

-

Volume

65

Article Issue

12

Related Issue

35799

Issue Date

2022-12-01

Receive Date

2022-02-21

Publish Date

2022-12-01

Page Start

239

Page End

249

Print ISSN

0449-2285

Online ISSN

2357-0245

Link

https://ejchem.journals.ekb.eg/article_226419.html

Detail API

https://ejchem.journals.ekb.eg/service?article_code=226419

Order

23

Type

Original Article

Type Code

297

Publication Type

Journal

Publication Title

Egyptian Journal of Chemistry

Publication Link

https://ejchem.journals.ekb.eg/

MainTitle

Evaluation of the Sewi dates safety produced by the traditional method

Details

Type

Article

Created At

22 Jan 2023