[frostqueen]

Originally Posted by Gr33nSanta

how about using your senses? Since I have grown and lab tested high cbd low thc cultivars, I have a lot of experience smoking cbd weed. I feel I can tell whether a plant has significant amount of cbd or not. I think the same is true for thc and that is exactly how we have high thc cultivars, growers have started selecting for high thc cultivars hundreds of years ago if not more, using their senses.

In some cases this might be enough. That said, many of us are trying to measure the amount of CBD present here, not how we feel after consuming it. Terpenes and other co-factors can influence how it feels, too, which can complicate things.

Additionally, using a smoke test for 50 or 100 sister plants all at once in early veg isn't practical. The idea is to have a standardized way to be sure that high CBD is present.

[Douglas.Curtis]

[PhenoMenal]

cool thread!

ive never tried the isopropyl + sodium hydroxide version before, I wasn't aware of it until this thread

but I have been using the standard Beam's test of potassium hydroxide and ethanol (i just use cheap methylated spirits which is 95% ethanol).

I do already have sodium hydroxide and isopropyl, so the next time i do Beam's test i'll try both side-by-side.

Here is a Beam's test and Thin Layer Chromatography i did last week... these are only about 1-2 minutes old at the time of the scan:

The CBD therapy is a 1:1 CBD:THC.
The Cinderella99 is just lots of THC.
The Dinamed CBD unfortunately is also just lots of THC, no CBD. (This was my 2nd Dinamed... the first one was a 1:1)

See the link in my signature for more info about both Beam's test and Thin Layer Chromatography

[Douglas.Curtis]

Awesome, looking forward to hearing your results. Loving the TLC photos! So much more informative.