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Physicochemical and Microbiological Evaluation of Commercial Tomato Concentrates Consumed In Egypt

Article

Last updated: 01 Jan 2025

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Tags

Food Science and technology

Abstract

This research was undertaken to determine quality characteristics of twenty four samples of commercial concentrated tomato puree was conducted. Fourteen brands of jar (A), five brands of sachet (B) and five brands of can (C) were evaluated for chemical, physical and microbiological properties. Analysis included each of the following determinations:  Total soluble solids, pH values, titratable acidity, sodium chloride content, ash content, colour, consistency, Howard mould count, total plate count, mould and yeast. Total soluble solids ranged from 20 to 25%, 22 to 25% and 18% to 30% for A, B and C, respectively. The pH values for all types of concentrated tomato puree were below 4.3. Titratable acidity ranged from 1.18 to1.9% for samples (A), 1.18 to 1.88% for samples (B) and 1.09 to 2.05% for samples (C). The sodium chloride content varied from 1.73 to 3.40%, 1.94 to 3.70% and 0.84 to 2.81% and ash content ranged from 3.2-5.2%, 3.83-4.98% and 2.48-6.06%, respectively. Colour measured by Hunter Lab Colormeter ranged between1.43 to 2.31, 1.51 to 2.11 and 1.67 to 2.09 a*/b*, while consistency ranged from 5.9-11.9 cm/30s, 7.45 to 12.67cm/30s and 5.70 to 9.01cm/30s, for samples A, B and C, respectively. Microbial growth could not be detected in all samples with one sachet concentrated tomato puree being the exception. Howard mould content varied between 12-20, 16-24 and12-20%, for samples A, B and C, respectively.

DOI

10.21608/asejaiqjsae.2013.3103

Keywords

Tomato concentrates, tomato puree, total soluble solids, pH, titratable acidity, NaCl, ash, colour, Consistency, Howard count, microbiology

Authors

First Name

Mona, H.H.

Last Name

Bekhet

MiddleName

-

Affiliation

Food Science and Technology Dept., Fac. of Agric., Alex. Univ., 21545-El-Shatby, Alexandria, Egypt

Email

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City

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Orcid

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Volume

34

Article Issue

October- December

Related Issue

546

Issue Date

2013-12-01

Receive Date

2013-11-04

Publish Date

2013-12-01

Page Start

395

Page End

402

Print ISSN

1110-0176

Online ISSN

2536-9784

Link

https://asejaiqjsae.journals.ekb.eg/article_3103.html

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https://asejaiqjsae.journals.ekb.eg/service?article_code=3103

Order

8

Type

Original Article

Type Code

53

Publication Type

Journal

Publication Title

Alexandria Science Exchange Journal

Publication Link

https://asejaiqjsae.journals.ekb.eg/

MainTitle

Physicochemical and Microbiological Evaluation of Commercial Tomato Concentrates Consumed In Egypt

Details

Type

Article

Created At

22 Jan 2023