Low THC from test - questions

[iggy097]

Posted my grow journal here - Event Horizon - Exotic Genetix | Rollitup
Now - I had the best pheno (what I thought) in the back tested at my local shop with a Purpl Pro Scientific and it came back at 12% THC which was very surprising for me as all my EG stuff usually reads in the mid 20's. If you look at the photos - it's the one that wasn't all burnt and small - the large one in the back right.
Could the fucked-up grow have inhibited THC production? I smoked it and it smokes fine, I was ripped. Neighbor who has a high tolerance said the same thing - that it wasn't the strongest he'd had but it was a real good buzz and he liked it a lot.

 

[mandocat]

Purple Pros are not reliable, in my experience. That being said, there are other factors than just THC that contribute to cannabis effects and plenty of lower testing weed strains can get you hammered!

 

[conor c]

Thc means not alot its everything together that matters its maybe just a bad run could be genetic remember alot of places blow there thc contents out the water as well i take what breeders say about thc content with a pinch of salt look at erdpurt plenty grow/like it and that alone tests like 7 to 10% thc and plenty like it so depends on you too i guess as well

 

[Lou66]

Maybe the device sucks? I work in an analytical lab and NIR without sample preperation wouldn't be my first choice for high accuracy or repeatability.

 

[Modern Selections]

Good example of why lab numbers are useless. The entourage effect is what makes the high. Numbers are low, yet you are ripped, proof is in the bowl.

Most wrecked I've ever been off smoking herbs was a 8-10% Vietnam Sativa. It was like acid. Looked like hay and wouldnt have any impressive numbers but by God you would be fucked up for half a day. Too much too much lol

Of course, any issues with the grow will affect the final outcome.

 

[iggy097]

Follow up from my own test (bought a tester)

 

[iggy097]

Maybe the device sucks? I work in an analytical lab and NIR without sample preperation wouldn't be my first choice for high accuracy or repeatability.

I'd like to get some tests done of my grows - can you point me in the right direction?

 

[Lou66]

I'd like to get some tests done of my grows - can you point me in the right direction?

I would go to a commercial lab that offers such services. Do you have labs for that in the US by now? LC is state of the art, GC has problems as CBD and THC are interfering with each other.
At home tests are always difficult. The simplest problem would be an inhomogenous sample. You point it at a part of the bud that has more leave so you read low, then point it at a part that is highly resinous and read high. The next problem is calibration. You don't have access to reference samples. Using only pure standards has problems as you ignore matrix effects that influence the measurement.
See, if you go down the rabbit hole it gets complicated really fast. Simpler to just use a service provider, cheaper too probably.

 

[iggy097]

I would go to a commercial lab that offers such services. Do you have labs for that in the US by now? LC is state of the art, GC has problems as CBD and THC are interfering with each other.
At home tests are always difficult. The simplest problem would be an inhomogenous sample. You point it at a part of the bud that has more leave so you read low, then point it at a part that is highly resinous and read high. The next problem is calibration. You don't have access to reference samples. Using only pure standards has problems as you ignore matrix effects that influence the measurement.
See, if you go down the rabbit hole it gets complicated really fast. Simpler to just use a service provider, cheaper too probably.

The Purpl seems to be a pretty accurate reading for home users. Plenty of people have tested it against medical % numbers from dispensaries and the numbers are very close. So for pheno hunting or just a ballpark it's pretty handy. I do want to have my Sugar Show sent out for testing - I'm trying to find a lab that offers this

 

[thisusernameisnottaken]

Good example of why lab numbers are useless. The entourage effect is what makes the high. Numbers are low, yet you are ripped, proof is in the bowl.

Most wrecked I've ever been off smoking herbs was a 8-10% Vietnam Sativa. It was like acid. Looked like hay and wouldnt have any impressive numbers but by God you would be fucked up for half a day. Too much too much lol

Of course, any issues with the grow will affect the final outcome.

What happened with the Vietnam sativa?

 

[Tolerance Break]

Gotta remember, we have a young understanding of cannabis, and thc is known as "the" psychoactive component in cannabis. Until the real research begins, after it gets rescheduled, it's all marketing.

 

[Lou66]

Gotta remember, we have a young understanding of cannabis, and thc is known as "the" psychoactive component in cannabis. Until the real research begins, after it gets rescheduled, it's all marketing.

There's been plenty of research into the chemistry and pharmacology of cannabinoids. Even a weight loss drug came out of it (and was pulled from the market). All the synthetics that are sold as "spice" are compounds that were invented in that time and then forgotten because noone could find an application for it.

 

[conor c]

I would go to a commercial lab that offers such services. Do you have labs for that in the US by now? LC is state of the art, GC has problems as CBD and THC are interfering with each other.
At home tests are always difficult. The simplest problem would be an inhomogenous sample. You point it at a part of the bud that has more leave so you read low, then point it at a part that is highly resinous and read high. The next problem is calibration. You don't have access to reference samples. Using only pure standards has problems as you ignore matrix effects that influence the measurement.
See, if you go down the rabbit hole it gets complicated really fast. Simpler to just use a service provider, cheaper too probably.

Exactly and alot of the folk testing way high are sending in the very tips of the bud rather than a fair sample from a few different bits on the plant so they test high

 

[conor c]

There's been plenty of research into the chemistry and pharmacology of cannabinoids. Even a weight loss drug came out of it (and was pulled from the market). All the synthetics that are sold as "spice" are compounds that were invented in that time and then forgotten because noone could find an application for it.

Did that contain thcv or was this another synthetic cannabinoid the one for weight loss you are talking about ?

 

[Tolerance Break]

There's been plenty of research into the chemistry and pharmacology of cannabinoids. Even a weight loss drug came out of it (and was pulled from the market). All the synthetics that are sold as "spice" are compounds that were invented in that time and then forgotten because noone could find an application for it.

Most of the research was done with synthetic cannibanoids, in large part because it was nearly impossible to get grants for researching cannabis, again due to its scheduling.

Cannabis research is still in its infancy

 

[Lou66]

Did that contain thcv or was this another synthetic cannabinoid the one for weight loss you are talking about ?

Most of the research was done with synthetic cannibanoids, in large part because it was nearly impossible to get grants for researching cannabis, again due to its scheduling.

Cannabis research is still in its infancy

It was research on the cannabinoid system. Natural compounds dont have any special ability that makes the superior to "synthetics". Most of the time their properties are worse. Eg THC has terrible water solubility and is thus unsuitable for oral dosing.

In the end a new compound is usually chosen as medicine because it can be patented. Not because it is better or worse than the natural product it was derived from.

Rimonabant is the weight loss drug. It failed because it caused suicides.

 

[Tolerance Break]

It was research on the cannabinoid system. Natural compounds dont have any special ability that makes the superior to "synthetics". Most of the time their properties are worse. Eg THC has terrible water solubility and is thus unsuitable for oral dosing.

In the end a new compound is usually chosen as medicine because it can be patented. Not because it is better or worse than the natural product it was derived from.

Rimonabant is the weight loss drug. It failed because it caused suicides.

I think we are on different topics. I'm saying cannabis and cannibanoid research is in its infancy, mainly speaking towards how the % on labels isn't directly proportional to potency.

 

[Roguedawg]

The smoking test is the only test that matters!

 

[meangreengrowinmachine]

Are there ways to test (yes smoking is the usual and best test) you home grown?

 

[Lou66]

I think we are on different topics. I'm saying cannabis and cannibanoid research is in its infancy, mainly speaking towards how the % on labels isn't directly proportional to potency.

Drug, set and setting are important. That's know since the sixties(?).