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I seem to have found an interesting article that is not mentioned on the forum.

Forensic analysis of Salvia divinorum using multivariate statistical procedures. Part I: discrimination from related Salvia species
Melissa A. Bodnar Willard, Victoria L. McGuffin & Ruth Waddell Smith
Anal Bioanal Chem (2012) 402:833–842
DOI: 10.1007/s00216-011-5479-0

There is a very meticulous analysis of various extraction parameters (solvents, extraction and storage times, etc).

The results imply that the most efficient extraction solvent is DCM (dichloromethane) - 1.255 times better than acetone. Also Salvinorin A is more stable in DCM than in other solvents.

[QUOTE="Trickster, post: 3482902, member: 127"] I seem to have found an interesting article that is not mentioned on the forum. [b]Forensic analysis of Salvia divinorum using multivariate statistical procedures. Part I: discrimination from related Salvia species[/b] [i]Melissa A. Bodnar Willard, Victoria L. McGuffin & Ruth Waddell Smith[/i] Anal Bioanal Chem (2012) 402:833–842 DOI: 10.1007/s00216-011-5479-0 There is a very meticulous analysis of various extraction parameters (solvents, extraction and storage times, etc). The results imply that the most efficient extraction solvent is DCM (dichloromethane) - 1.255 times better than acetone. Also Salvinorin A is more stable in DCM than in other solvents. [/QUOTE]