Comparison of Chemical Composition between Kuromoji (Lindera umbellata) Essential Oil and Hydrosol and Determination of the Deodorizing Effect

Abstract

Kuromoji (Lindera umbellata) is a tree that grows throughout Japan. The components of kuromoji essential oil have antitumor and aromatherapy effects. However, the composition of the hydrosol, obtained as a by-product of the essential oil process, is unknown. Furthermore, it is unknown whether kuromoji essential oil has a deodorizing effect. Therefore, the purpose of the current study was to compare the chemical composition of kuromoji essential oil and hydrosol, as well as evaluate the deodorizing effect of the former. The chemical composition of samples was evaluated using gas chromatography–mass spectrometry (GC-MS). Additionally, the deodorizing effect of Kuromoji essential oil was investigated with the detector tube method using ammonia, hydrogen sulfide, methyl mercaptan, and isovaleric acid. Linalool was the most abundant component in both the essential oil and hydrosol; however, its proportion was higher in the hydrosol (57.5%) than in the essential oil (42.8%). The hydrosol contained fewer chemical components, but higher proportions of trans-geraniol and ethanol. Moreover, the essential oil eliminated 50% of ammonia and 97.6% or more of isovaleric acid. Interestingly, linalool was soluble in the hydrosol and did not irritate the skin. This suggests that the hydrosol may be an effective foot care product.

Psychological and Antibacterial Effects of Footbath Using the Lindera umbellata Essential Oil

“…We recently reported the chemical composition of Lu essential oil [ 17 ]. Linalool is the main component of the Lu essential oil used in this study (42.8%), followed by 1.8-cineole and D-limonene (13.7% and 7.42%, respectively; Figure S1 ).…”

“…Some essential oils containing mainly 1,8-cineole have been reported to inhibit the growth of some pathogenic bacteria [ 24 , 25 , 26 ]. Although the Lu essential oil also contains 1.8-cineole [ 17 ], there was no significant difference in the antibacterial effect between the C group and the L group. The concentration of the Lu essential oil may be able to explain this result.…”

“…The Lu essential oil extracted from the branch of Japanese Lu through high-pressure steam distillation was obtained from Kojo Technology (Aomori, Japan). The chemical components of Lu essential oil were previously analyzed using gas chromatography-mass spectrometry [ 17 ]. The main components are reported to be linalool (42.8%) and 1,8-cineole (13.7%) [ 17 ].…”

“…The chemical components of Lu essential oil were previously analyzed using gas chromatography-mass spectrometry [ 17 ]. The main components are reported to be linalool (42.8%) and 1,8-cineole (13.7%) [ 17 ].…”

Volatile Components of the Kuromoji Essential Oil (<i>Lindera umbellata</i> Thunb.) and the Utilization for Touch Care Treatment

“…The contents of linalool and 1,8-cineol were different than those found in oobakuromoji oil from Aomori Pref. 5,32) .…”