University Of Tasmania

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Determination of enantiomeric distribution of terpenes for quality assessment of Australian tea tree oil

journal contribution
posted on 2023-05-22, 00:12 authored by Noel DaviesNoel Davies, Larkman, T, Marriott, PJ, Khan, I
A number of papers have appeared in recent years proposing the use of enantiomeric ratios of key monoterpenes in Australian tea tree oil (TTO) for detection of adulterated oils. There are however a range of reported values, even from exactly the same suite of authentic oils, and we address here probable reasons for these differences, and stress the importance of establishing reference ratios within each laboratory based on oils of known provenance. Any biological variation in the ratio for the key terpene terpinen-4-ol has been demonstrated to be effectively unmeasurable, as the standard deviation on multiple measurements of the same oil is of the same order as that of multiple authentic oils.


Publication title

Journal of Agricultural and Food Chemistry




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Socio-economic Objectives

Other plant production and plant primary products not elsewhere classified

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