ortho, meta and para- elution order?

[thohry]

I am analyzing essential oil. Sometimes there are peaks of isomers (o, m, p), but the orders are not defined.
In general, is there any order of elution among them?

Thanks

[Don_Hilton]

Order will depend on the stationary phase in the column. I typically have a retention time or retention index table handy when I do this kind of work.

[WK]

thohry,
Which essential oil components do you refer to?
And in which essential oils do they occur?
Thanks
WK

[thohry]

Hi WK

That is the essential oils of new trees, probably they have no official name yet (or I do not know). I will post the compounds' names later, now I do not have in hand.

[Bryan Evans]

Below is an application for essential oils separated on Cadenza CD-C18:
http://www.silvertonesciences.com/files/TI355E.pdf

[thohry]

Below is an application for essential oils separated on Cadenza CD-C18:
http://www.silvertonesciences.com/files/TI355E.pdf

Great, now I know they can analyze essential oil by HPLC for the first time.