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Protocols for re-testing out of date essential oils
Are there any accepted protocols for re-testing out of date essential oils?Our experience is that some essential oils obviously “go-off.” Others, after the use-by-date has expired, appear 100% OK. I’m referring here to organoleptic tests only. After all, essential oils are only used for fragrance.Any one have any insight here?Thanks -
1 Reply
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Seeing as peroxide’s are more reactive and sensitizing (limonene is a great example) retesting is a must in my opinion.
There might not be a single best way of doing so, if retesting the essential oil Ineouls hold it against the CofA from when you recieved the batch. And run the same tests If possible. Otherwise I think, Depending on the machinery you have available, I would either do a GC-MS or a iodometric peroxide value titration. However both of them need a baseline of what the unexpired Essential oil has as mEq value (as these may differ a lot from Oil to oil and likely batch to batch)
http://www.graveslab.org/lab-resources/procedures/peroxide-quantification-via-iodometric-titration
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