Chemical Composition of Distilled Essential Oils and Hydrosols of Four Senegalese Citrus and Enantiomeric Characterization of Chiral Compounds

The selection of native Lavandula species and their economic exploitation have increased in the last few years. Micropropagation techniques have been used as an alternative for vegetative propagation allowing the multiplication of selected genotypes and chemotypes. Our previous studies showed that the essential oils of Lavandula pedunculata have an important antifungal activity against dermatophyte strains. Therefore, a new line of investigation concerning the in vitro culture of this species is justified. In the present study we compare the morphology of the leaf trichomes and the chemical composition of their essential oils in both field-growing and in vitro propagated plants.

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Characterization of the chemical composition of the essential oils from Annona emarginata (Schltdl.) H. Rainer 'terra-fria' and Annona squamosa L.

Revista Brasileira de Fruticultura ◽

10.1590/s0100-29452014000500024 ◽

2014 ◽

Vol 36 (spe1) ◽

pp. 202-208 ◽

Cited By ~ 1

Author(s):

Felipe Girotto Campos ◽

Daniel Baron ◽

Marcia Ortiz Mayo Marques ◽

Gisela Ferreira ◽

Carmen Silvia Fernandes Boaro

Keyword(s):

Mass Spectrometry ◽

Gas Chromatography ◽

Chemical Composition ◽

Essential Oil ◽

Essential Oils ◽

Nutrient Solution ◽

Annona Squamosa ◽

Chemical Profiles

The objective of this study was to characterize the chemical composition of the essential oil from the leaves of Annona emarginata (Schltdl.) H. Rainer 'terra-fria' and Annona squamosa L. The species were grown in a greenhouse for 18 months, which nutrient solution was applied weekly; the plants were then harvested and the leaves dried to extract the essential oil. The essential oil was analyzed by gas chromatography and mass spectrometry to study its chemical profiles. Eleven substances were found in the essential oil of A. emarginata, primarily (E)-caryophyllene (29.29%), (Z)-caryophyllene (16.86%), γ-muurolene (7.54%), α-pinene (13.86%), and tricyclene (10.04%). Ten substances were detected in the oil from A. squamosa, primarily (E)-caryophyllene (28.71%), (Z)-caryophyllene (14.46%), α-humulene (4.41%), camphene (18.10%), α-pinene (7.37%), β-pinene (8.71%), and longifolene (5.64%). Six substances were common to both species: (E)-caryophyllene, (Z)-caryophyllene, α-humulene, camphene, α-pinene, and β-pinene.

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Investigation of the Adulteration of Essential Oils by GC-MS

Current Analytical Chemistry ◽

10.2174/1573411015666191127093710 ◽

2020 ◽

Vol 16 (8) ◽

pp. 965-969 ◽

Cited By ~ 1

Author(s):

Mara Dubnicka ◽

Benjamin Cromwell ◽

Mindy Levine

Keyword(s):

Chemical Composition ◽

Essential Oils ◽

Health Concern ◽

Gas Chromatography Mass Spectrometry ◽

Store Brand ◽

Potential Toxicity ◽

Tea Tree ◽

Retail Location ◽

Reported Health

Background: A lack of regulation about the chemical composition of essential oils and the growing popularity of these oils among consumers presents an urgent need for the accurate characterization of various oil types from a variety of manufacturers. The aim of this paper was to characterize the composition of essential oils bought from a popular retail location, with the goal of understanding the chemical composition and presence of adulterants with potential toxicity. Methods: Reported herein is an investigation into the components of a variety of essential oils using gas chromatography-mass spectrometry (GC-MS). The investigation initially focused on two popular oils, tea tree and lavender oil, and then moved to investigate four additional essential oils from the same brand (sandalwood, rose, eucalyptus, and lemongrass). Results: Results of this analysis indicated that all six store brand essential oils contained Carbitol (in concentrations from 23% to 35%), and four of the six oils had diethyl phthalate (in concentrations ranging from 0.33% to 16%). These toxicants are particularly concerning because they are known inhalation hazards, and the intended usage of these oils is for aromatherapy (i.e. inhalation). Conclusion: These results highlight a potentially significant and under-reported health concern from inhalation of toxic contaminants in the store brand oils, and showcase the need for more regulation and transparency about the composition of these commercial products.

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