Lab tested medical marijuana...

most of the dispensaries ive seen that do lab testing are in the bay area and ive only seen a few in la. i know theres two labs in oakland that do testing so thats why you find it more up north.
but they also test for CBD and CBN. a lot of clinics in the bay area are getting known for carrying high cbd strains now. i got one recently when i was up there visiting that was 6.2% cbd and 7.6% thc. it was definitely a different high. more body and sedative for sure with almost zero cerebral high, but still very effective. its kinda cool to see the percentages of your buds but unfortunately its very rare in so cal.

 

As said before, content of all cannaboids.
it's pretty easy, just take a sample and prep it (lots of different ways of extraction, I prefer headspace extraction since it can be fine-tuned, but others like subcritical water extractions), prepare a standard, and toss 'em through a gc/ms.

 

english please? ^


its pretty rare for places to test here in colorado as well, i wish it were more affordable, then i think it would be much mroe common.

 

I have looked at a couple places in CO and it is only $25-30 a test and you only needed to provide a gram for each strain/extract you wanted tested

 

So labs use whats called gas chromatography/mass spectrometry (GC/MS) as a way to separate the different cannabinoids in the Cannabis extract and determine their concentrations in the plant. Some labs also test for the presence of residual pesticides, herbicides, and mold. I think its an essential component if medical marijuana was ever rescheduled to schedule II so it can be prescribed. FDA required quality control for their medicines and since as we know Cannabis is a superior medicine to a vast majority of pharmaceuticals it should be fine

 

lol, what did you not understand?
you have to extract what you are testing for, whether it be mold or cannaboids.
Then you prepare a standard, so you have something to compare the results of your extraction to.
Then you run them all through an analyzer of some kind. The most commonly used is a gas chromatograph with a mass spectrometer attached to the end of the GC.
The gas chromatograph separates the components in the analyte (thing being analyzed) based on relative polarity. Most GC columns are very long thin tubes arranged in a coil. The inner surface of the tube is lined with a silicate coating, sometimes with a coating to fine-tune the polarity of the tube.
Wikipedia is a good place to start to learn about it, if yo want to learn more there are several good books on Amazon. If you have the physics and chemistry background, an Instrumental Analysis text goes into great background, just be wary of those that are over 5 to 10 years old, we've been making lots of advances in chromatographic and spectrometric processes
yes, I am a chemist. sorry

 

Is the general consensus that percentages are correct? I always feel like it may be a bit of a gimmick, since I usually can't find much information about where the medical cannabis is test/or how.

 

I couldn't tell ya, since I'm on the wrong coast and have not had much luck finding work over in those labs.

 

The club I go to offers growers the option to pay a $60 fee for lab testing as discussed already as well as pesticide testing so they can label their product organic. It's becoming more and more popular.

 

Checkout weedmaps' youtube channel nugporn

they have a video explaining the testing process and what not decently informative.