Evaluation of fast enantioselective multidimensional gas chromatography methods for monoterpenic compounds: Authenticity control of Australian tea tree oil

2015 ◽  
Vol 1406 ◽  
pp. 307-315 ◽  
Author(s):  
Yong Foo Wong ◽  
Rachel N. West ◽  
Sung-Tong Chin ◽  
Philip J. Marriott
Keyword(s):  
Gas Chromatography ◽  
Tea Tree Oil ◽  
Tea Tree ◽  
Multidimensional Gas Chromatography ◽  
Authenticity Control ◽  
Enantioselective Multidimensional Gas Chromatography

Enantioselective Multidimensional Gas Chromatography of Some Secondary Alcohols and Their Acetates from Banana

1991 ◽  
Vol 46 (1-2) ◽  
pp. 33-36 ◽  
Author(s):  
Vera Schubert ◽  
Renate Diener ◽  
Armin Mosandl
Keyword(s):  
Gas Chromatography ◽  
Secondary Alcohols ◽  
Multidimensional Gas Chromatography ◽  
Enantioselective Multidimensional Gas Chromatography

Abstract Using enantioselective MDGC the enantiomeric distribution of alkan-(alken-)2-yl-acetates from bananas is achieved. After simple acetylation their corresponding alcohols 2-pentanol, 2-hexanol, 2-heptanol an d (Z)-4-hepten-2-ol respectively are also exactly stereodifferentiated by the same method. All compounds investigated -esters as well as alcohols -exhibit a remarkable excess of the (S)-enantiomers.

Chemical Components and Antimicrobial Activities of Tea Tree Hydrosol and Their Correlation With Tea Tree Oil

2021 ◽  
Vol 16 (9) ◽  
pp. 1934578X2110383
Author(s):  
Xiaoxue Li ◽  
Dan Shen ◽  
Qiushuang Zang ◽  
Yan Qiu ◽  
Xuedong Yang
Keyword(s):  
Gas Chromatography ◽  
Antibacterial Activities ◽  
Antimicrobial Activities ◽  
Gas Chromatography Mass Spectrometry ◽  
Chemical Components ◽  
Tea Tree Oil ◽  
Tea Tree ◽  
Flame Ionization ◽  
Broth Dilution ◽  
Paper Disc

Tea tree hydrosol (TTH) is the aqueous phase of the distillate from the steam distillation process of the twigs and leaves of Melaleuca alternifolia. In this study, the chemical components of TTH were analyzed by gas chromatography–mass spectrometry (GC–MS) and gas chromatography–flame ionization detector (GC-FID). The major components were terpenoids (1.53 mg/mL), including monoterpenoids and sesquiterpenoids. The antibacterial activity of TTH was assessed by paper disc agar diffusion and broth dilution methods. Terpinen-4-ol (MIC: 0.31-0.62 mg/mL), 2- endo-hydroxy-1,8-cineole (MIC: 1.25-2.50 mg/mL) and p-menth-3-ene-1,2-diol (MIC: 0.62-2.50 mg/mL) were the main antibacterial components of TTH. The results showed that the major components of TTH and tea tree oil (TTO) had the same parent structures, but different degrees of oxidation. Terpinen-4-ol was the most abundant component in both TTH (624.2 μg/mL) and TTO (35-48%), and played a major role in antibacterial activities. This is the first report on the chemical components and antibacterial activities of TTH and their correlation with TTO, which demonstrates the potential application of TTH as a natural antimicrobial agent in health care products.

Determination of tea tree oil terpenes by headspace gas chromatography mass spectrometry

2016 ◽  
Vol 8 (23) ◽  
pp. 4576-4583 ◽  
Author(s):  
D. Gallart-Mateu ◽  
S. Rodriguez-Sojo ◽  
M. de la Guardia
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Quality Control ◽  
Gas Chromatography Mass Spectrometry ◽  
Headspace Gas Chromatography ◽  
Alternative Procedure ◽  
Tea Tree Oil ◽  
Tea Tree ◽  
Headspace Gas

An alternative procedure was developed for determining quality control of terpenes in tea tree oil commercial samples.

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