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ISSN 2278-2540 | DOI: 10.51583/IJLTEMAS | Volume XV, Issue V, May 2026
Extraction and Applications of Rosmarinus
Prof . Yasir. A. Mohame, Dr.Elrafie A. A.Allah, Shimaa A. M.Mohamed
Department of Chemical Engineering, Faculty of Engineering, University of ElImam ElMahdi,
Kosti, Sudan
DOI: https://doi.org/10.51583/IJLTEMAS.2026.150500154
Received: 13 May 2026; Accepted: 18 May 2026; Published: 10 June 2026
ABSTRACT
The main objective of this research is to evaluate the antioxidant, cytotoxic, and antimicrobial efficacy of
rosemary (Rosmarinus officinalis), quantify its extraction yield, and elucidate its phytochemical profile.
Rosemary, also known as Rosmarinus officinalis, is native to the Mediterranean region. It belongs to the mint
family and is an evergreen shrub related to basil and marjoram. Some rosemary plants can reach a height of one
meter or more. Its small, grayish-green leaves resemble pine needles and have a sweet, slightly bitter aroma
similar to lemon. Its flowers range in color from white to light and dark blue and bloom in the spring.
A sample of rosemary was taken, dried, ground, weighed, and placed in a Soxhlet extraction apparatus. After
exiting the apparatus, it was weighed, the extraction rate was calculated, and the components present in the
rosemary were identified and collected by conducting phytochemical analysis using potassium hydroxide, ferric
chloride, copper acetate, acetic anhydride, and concentrated sulfuric acid.
Chemical laboratory experiments were carried out, revealing some substances such as flavonoids (yellow),
tannins (dark green), terpenes (blue-green), and saponins. Foam was observed, but anthraquinone glycosides
were not detected. Furthermore, its toxicity to stromal cells was tested using shrimp. Six samples of the extract
were taken at different concentrations, and the shrimp were monitored for a full day.
The bioassay demonstrated a classical dose-dependent relationship, where higher concentrations correlated with
significantly increased mortality rates of the tested cells.
Based on these findings, Rosmarinus officinalis shows profound therapeutic potential and is highly
recommended for further pharmacological investigation against neurodegenerative disorders (e.g., Alzheimer's
disease), depression, diabetes, and oncological malignancies. Due to its proven antimicrobial, anti-inflammatory,
antioxidant, and hair-growth-stimulating properties, future milestones will focus on formulating this bioactive
extract into functional foods and dietary supplements. Furthermore, downstream research will investigate the
genetic variations within local rosemary cultivars and evaluate their direct impact on the plant's chemotypic
profile and biological efficacy.
Keywords: Extraction,Rosmarinus,Applications, antioxidant, cytotoxic, antimicrobial
INTRODUCTION
Rosemary is native to the Mediterranean area. A member of the mint family, it is an evergreen shrub also related
to basil, marjoram, and oregano. It is usually found growing by the ocean, and its latin name equates to "dew of
the sea .Most commercially used, dried rosemary comes to us from Spain, France, and Morocco. However, it is
easy to grow your own in temperate climates.
Phenotypically, the plant is characterized by its dimorphic growth habit, typically reaching a bushy height of 1.0
to 1.8 meters. The small, gray-green leaves look similar to small pine needles and have a bittersweet, lemony,
slightly piney flavor,Small flowers range from white to pale blue to dark blue, usually flowering in late spring.
Usage of rosemary dates back to 500 BC. when it was used as a culinary and medicinal herb by the ancient
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Greeks and Romans. It is still a popular medicinal herb today. In 1987, researchers at Rutgers University in
New Jersey patented a food preservative derived from rosemary.
The chemical called rosmaridiphenol, is a very stable antioxidant useful in cosmetics and plastic food packaging,
Rosemary is indeed a versatile, aromatic rosmarinus officinalis is common household plant grown in many part
of the world.
Rosemary extracts boast a complex chemical profile comprising several distinct phytochemical classes[1],[2].
These components can be categorized as follows:
Phenolic Acids & Flavonoids: Key contributors to the plant's overall antioxidant matrix.
Phenol Diterpenes: Most notably carnosol and carnosic acid, which drive the plant's stabilization
properties[3].
Volatile Compounds: Essential oils responsible for the herb's characteristic aroma and flavor profile[4].
Other Bioactive Constituents: Tannins, polyphenols, polysaccharides, and triterpenic acids[2].
Organic & Inorganic Matter: Residual matrices including proteins, lipophilic substances, lipids, resins,
waxes, carbohydrates, and various inorganic substituents.
Both fresh and dried leaves of rosemary have been used for their characteristic aroma in food cooking or
consumed in small amounts as herbal tea, while rosemary extracts are routinely employed as natural antioxidants
to improve the shelf life of perishable foods [1]. Also, it is used traditionally as a flavoring agent and
antispasmodic in renal colic and dysmenorrhea, in relieving respiratory disorders, and to stimulate hair growth
[5]. It is one of the medicinal plants that has different pharmacological activities [5], such as antimicrobial effects
on mono- and polymicrobial biofilms [6], cytotoxicity and anti-cancer activity [4], [7], [8], anti-inflammatory
capacity, and genotoxicity.
MATERIALS AND METHODS
Materials
Rosmarinus officinalis Leaves was obtained from local market in Sudan (Alarbi market,Kartoum) .
Chemicals and Reagents:
Petroleum ether (SDFCL, sd fine- chem. limited /INDIA ) methanol((SDFCL, sd fine- chem. limited /INDIA ),
prepared sea water, brine shrimp egg, nutrient agar, potassium hydroxide solution, ferric chloride reagent,
chloroform, Cupric acetate, Acetic Anhydride, concentrated , distilled water, ethanol,
Equipment and Apparatus:
Test tube , filter paper , conical flasks, micro pipette, measuring cylinder, soxhlet apparatus Adevice invented
by Hendel [2], , Sensitive balance., rotary evaporator.
Boiling flask:A glass container at the bottom containing the solvent, which is heated to evaporate it.
Extraction tube/ Soxhlet extractor:Located above the heating flask and contains a sample holder.
Paper thimbles/Sample holders:A tube made of thick filter paper into which the plant material
(rosemary) is placed for extraction.
Coil condenser:Assembled at the top of the extraction device, the evaporated solvent is passed
through it to be cooled, condensed, and returned to the sample holder.
Siphon arm:A side arm that allows the solvent loaded with the extracted compound to be discharged
from the s0ample holder into the heating flask
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Methods
Extraction
The Soxhlet apparatus for rosemary extraction consists of a heating flask, a main extraction unit, a condenser,
and a porous paper thimble containing the rosemary powder, utilizing a suitable solvent such as methanol to
dissolve the target phytochemical compounds.
Figure 1 illustrates a typical single-stage extraction process flow, which operates based on the following
fundamental streams:
Feed (F): The initial solution or matrix containing the components to be separated, which enters and
nourishes the extraction process.
Solvent (S): The liquid phase added to the feed (F) specifically for the purpose of mass transfer and
extraction. Solvents can be classified into single solvents (composed of a single pure chemical substance)
and mixed solvents (blends of multiple components). Mixed solvents are strategically formulated to
impart specific thermodynamic properties, such as adjusting polarity or simultaneously extracting
distinct classes of compounds.
During operation, the feed mixture is intimately contacted with the solvent within a mixing vessel to maximize
the interfacial area for mass transfer. Subsequently, the resulting mixture is transferred to a phase separator
(settler), where it splits into two distinct operational layers:
1. Raffinate Layer (R): The residual feed phase, which has been depleted of the solute.
2. Extract Layer (E): The solvent-rich phase, which now contains the desired solute.
Following phase separation, the solvent (S) is recovered and stripped from both the Raffinate (R) and Extract
(E) streams. To optimize process economics and minimize material waste, the recovered solvent (S) is recycled
in a high proportion back to the mixing vessel for continuous reuse[9].
Device Operation Steps
Place the solid material from which the compounds are to be extracted inside a tube made of thick filter paper
or grease-free paper. Install the sample tube in the device's extraction chamber, then place the entire device over
a beaker containing the appropriate solvent, and connect the condenser at the top and the solvent is heated in
the beaker, where it evaporates and rises through distillation arm to reach the condenser at the top.
The condenser cools the solvent vapor and condenses it into a liquid. This liquid then drips onto the sample
inside the extraction chamber.the chamber is filled with hot solvent, causing a portion of the desired substance
to dissolve in the solvent.
Batch Evacuation: When the liquid level reaches the side siphon arm, suction occurs, allowing the dissolved
solvent and the desired compound to flow back into the distillation flask.
Figure( 1) : The extraction process Single-stage
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This cycle is repeated continuously, as the solvent evaporates, condenses, and then flows over the sample,
ensuring thorough and efficient extraction of the desired compounds.
After the extraction process is complete, the solvent is removed from the flask, usually using a rotary evaporator,
to obtain the extracted compound about 75 gram of Coarsely powder was extracted by petroleum ether,and the
extraction was done by using soxhlet apparatus which is compose of heat source, distillation tube, siphon tube,
and condenser the extraction process was done in 8 hour until the colour in siphon tube became colourless after
that the solvent was evaporated under reduce pressure by using rotary evaporator apparatus. extract allowed to
complete dryness, and the yield percent was calculated.
The mark was reback by methanol and the yield percent was calculated, about 75 gram of plant leaves
(Rosmarinus officinalis) was extracted by methanol. And the yield percent was calculated. Finally measure the
weight of the sample and the final product.
Phytochemical screening of Rosemary:
Firstly about 0.5 gram of Rosmarinus officinalis extract was taken and then 30 ml of ethanol was added as
solvent in conical flask, after that the mixture was filtrated, then the filtrate was divided into many test tubes to
do different phytochemical screening tests.
Six samples of Rosmarinus officinalis extract were prepared with different agents range . Samples from the
extracts solutions were collected and tested for Flavonoids, Tannin, terpenoid, ditepenes. Anthraquinone
glycoside, and Saponin .
RESULTS AND DISCUSSION
The Yields percentage of extraction:
The percentage of extracts were calculated as followed :
( weight of extract /weight of crude plant material )×100%
Table (1) yield of extracts of Rosmarinus
Extract
Initial weight(g)
Final weight (g)
Yields%
Petroleum ether extract
75
3.2
4.267%
Methanol extract
75
14
18.67%
Difference between extractions yields demonstrated in Table (1) showed that the highest yield in extractions
was achieved by the methanol and the lowest yield percentage in extraction was showed by petroleum
ether,the different in yields according to the solvent which was use and these may be related to the polarity of
the solvent plant consist of some polar component .
The result of phytochemical test:
The results of Phytochemical screening for methanolic extract of Rosmarinus officinalis was monitoring in
table (2).
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Photo (1) : show the phytochemical results :
Test
Picture
Flavonoids
Tannin
Terpenoid
1-diterpenoid
2-Triterpenoid
3-Anthraquinone glycoside
Saponin
(+)ve = presence of phytochemical group, (-)ve=absence of phytochemical group
Photo (1) show the phytochemical results of the rosemary extract consist of several phytochemical classes The
appearance of the Dark yellow color confirms the presence of flavonoids., The appearance of the Dark green
color confirms the presence of tannin., The appearance of the greenish blue color confirms the presence of
diterpenoid. The appearance of the brown color confirms the presence of diterpenes, The absence of apinkish-
red color confirms the absence of Anthraquinone glycoside and After adding the solvent foam appears Saponin.
cytotoxic results:
Cytotoxic activity of the studied plant using brine shrimp assay was shown in table (2).
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Table (2) cytotoxic effect of Rosmarinus officinalis Methanolic extract on brine shrimp nauplii:
Triplicate samples of each extract were tested initially at concentrations of 10, 100 and 1000 ppm (µg/mL) in
test tube containing 5 mL of brine solution and shrimp the Rosemary studied extracts revel cytotoxic effect
when it tested against brine shrimp .
The lethal percentage effect of Methanolic extract is highest cytotoxic activity and this appear with the lower
concentration and this may be due to remove of fat increase activity. The three samples are monitored every hour
and the results are recorded within 24 hours. It becomes clear that rosemary contains compounds that are safe
for cells as shown in the diagram.
Figure 2: showed the cytotoxic Effect of Rosmarinus officinalis methanolic extract on brine shrimp
nauplii.
CONCLUSION
Phytochemical screening of the Leaves of Rosmarinus officinalis showed presence of flavonoids, tannins,
terpenes and it is very rich of Saponin, and the yields percentage of petroleum ether, methanolic and crude
methanolic was found 4.267%, 16.4%and 18.67% respectively.The tested extracts of Rosmarinus officinalis
were exhibited antioxidant, cytotoxic and antimicrobial activity. These results confirm the folkloric use of
rosemary as antibiotic , hair protective and antioxidant agent.
It is highly recommended that The petroleum ether extract of Rosemary revealed highly effect as antimicrobial
and antioxidant and need further studies to identify , isolate and purify there constituent.
The studies plant is rich with Saponin that permit it to be formulated as antifungal dosage form (shampoo).
Further studies needed for isolation and purification of active constituent of tested plant. The remarkable
antioxidant results of studied plant enable to use it for treatment of cancer after the cell line study. Confirmatory
studies needed for other traditional use.
0
5
10
15
20
25
30
35
1hour 3hours 6hours 12hours 24hours
1000p pm
100p pm
10p pm
Concentration(ppm)
1hr
3 hr
6 hr
12 hr
24 hr
lethal%
1000
3
5
13
15
20
66.66%
100
8
18
23
24
27
90%
10
9
24
27
28
29
96.66%
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