試品中的薰衣草花水中所含的萜品烯-4-醇(terpinen-4-ol)有0.0075%,而乙酸沉香酯(linalyl
acetate) 只有0.00025%. 證明萜品烯-4-醇較乙酸沉香酯親水性.
亦因為薰衣草花水中所含的乙酸沉香酯是極其微量,
所以沒有薰衣草精油的香氣.
Source: Robert Tisserand Essential Training
Did you know that the hydrosol and essential oil from the
same plant contain the same constituents but often at very different ratios?
Because the hydrosol only contains about 0.05% of
aromatic constituents, they are able to dissolve in this watery medium as they
are partially water soluble.
Just to be clear, in the example below the actual
percentage of terpinen-4-ol in lavender hydrosol 0.0075% of the total hydrosol
and the percentage of linalyl acetate is 0.000025%.
We can see from
this example that terpinen-4-ol has more water solubility than linalyl acetate.
Because hydrosols are 99.95% water, they are inherently
safer than essential oils.
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