Some times, the #olfactory senses may offer a preliminary means of detecting #residual #solvents within cannabis resin.
If the solvents have not undergone thorough purging during the #extraction process, they may impart a distinctive chemical fragrance.
This sensory signature is very often related to the specific type of solvent employed.
For instance, #ethanol may impart a faintly sweet and/or alcoholic scent, #acetone hiting a lemony undertone to it, whereas hydrocarbons such as #butane or #propane may yield a more acrid, petroleum-like aroma, #heptane having a mild gasoline-like aroma to describe a few.
However, it is imperative to underscore that reliance solely "on your nose" is inadequate for a #precise #determination of the presence or concentration of residual solvents.
The widely used rule of thumb, "if you can't smell it it's gone" does not apply in the matrix, that cannabis resins and oils present. Some solvents present a great #risk even in a couple of 100 ppms..
To achieve a rigorous and accurate assessment, turning to #laboratory #analyses remains a good practice, for anyone considering the health risk in producing cosmetics, food supplements of API...
The link leads you to a very informative chapter and a very revelant publication by Springer science.
editor:
Shaun R. Opie, PhD
https://lnkd.in/er3QADyu