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422146

Quantitative Estimation of Caffeine Concentration in Three Commercial Black Teas, Purchased from Local Markets in Al-Kharj Province, Saudi Arabia

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Last updated: 04 May 2025

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Subjects

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Tags

Section A: Natural Products and Metabolomics

Abstract

Determination of caffeine content in three commercial black tea packets purchased from the local markets in Al Kharj province, Saudi Arabia which was performed using a fast gravimetric technique. Different methods were applied, based on using UV/Vis spectrophotometer and chromatographic method compared with a standard caffeine for quantitative determination. The three samples were showed different concentrations of caffeine ranges from 15.3 – 25.8 mg/g. The highest concentration of caffeine was found in the black tea of Kenyan manufacturer, followed by the black teas of Sri Lankan manufacturer. Phytochemical properties identified in our study may be employed as a part of the pharmacopeial standard, playing an important role in its standardization. In addition, physicochemical, organoleptic, and phytochemical screening were evaluated for these three samples. The aim of our research on the commercial black tea obtained from different regions, is to confirm the quality and safety of the local commercial products sold in the local Saudi market to verify if the amount of caffeine that was not listed on the packaging is considered safe to human health or no. Currently, the Saudi Food and Drug Authority mandates to label caffeinated beverages must display the caffeine content.

DOI

10.21608/erurj.2025.359961.1230

Keywords

Caffeine, UV/Vis, TLC, Black tea

Authors

First Name

Sherouk

Last Name

Sweilam

MiddleName

Hussein

Affiliation

Department of Pharmacognosy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia./ Department of Pharmacognosy, Faculty of Pharmacy, Egyptian Russian University, Cairo-Suez Road, Badr City, Cairo 11829, Egypt

Email

s.sweilam@psau.edu.sa

City

Al-Kharj

Orcid

0000-0002-5352-4778

First Name

Lamees

Last Name

Aljumaiah

MiddleName

Abdulrahman

Affiliation

Graduation Project student, Female Section, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia.

Email

aljumaiahlamees@gmail.com

City

Al-Kharj

Orcid

-

First Name

Shahd

Last Name

Alharbi

MiddleName

M.

Affiliation

Graduation Project student, Female Section, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia.

Email

alharbi.shahad3@icloud.com

City

Al-Kharj

Orcid

-

First Name

Nouf

Last Name

Alaskar

MiddleName

Abdullah

Affiliation

Graduation Project student, Female Section, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia.

Email

noufalaskarr@gmail.com

City

Al-Kharj

Orcid

-

First Name

Ahmed

Last Name

Foudah

MiddleName

I.

Affiliation

Department of Pharmacognosy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia.

Email

a.foudah@psau.edu.sa

City

Al-Kharj

Orcid

0000-0002-6728-8614

Volume

4

Article Issue

2

Related Issue

55428

Issue Date

2025-04-01

Receive Date

2025-02-26

Publish Date

2025-04-01

Page Start

2,351

Page End

2,365

Print ISSN

2812-6211

Online ISSN

2812-622X

Article File

ERURJ_Volume 4_Issue 2_Pages 2351-2365.pdf

PDF . 459.1kB

Link

https://erurj.journals.ekb.eg/article_422146.html

Detail API

http://journals.ekb.eg?_action=service&article_code=422146

Order

422,146

Type

Original Article

Type Code

2,445

Publication Type

Journal

Publication Title

ERU Research Journal

Publication Link

https://erurj.journals.ekb.eg/

MainTitle

Quantitative Estimation of Caffeine Concentration in Three Commercial Black Teas, Purchased from Local Markets in Al-Kharj Province, Saudi Arabia

Details

Type

Article

Created At

04 May 2025