General Marijuana Growing
Testing THC Content in the
The Grow Room forums; So I have been searching for an answer to this. How could someone such as myself test the THC content ...
Testing THC Content
So I have been searching for an answer to this. How could someone such as myself test the THC content of my buds? Im sure you need some expensive technical equipment but I am still curious to know. Because I am about certain that half of the percentages that companys are givin are slightly flawed.
*testing for THC is gonna cost ya.. (nothing around going) to a place who does testing, just doesnt seem right to drop 70-100k for one of those machines/testers.spectroma.somethings' in your house?
Originally Posted by SirLancelot
how can you be so certain that the percentages are flawed sir, people pay good money to labs to have their stuff tested by people who went to school for chemistry and know how to extract the stuff and tell you what percentage of the bud THC was. So im not exactly sure what your reasoning is behind its flawed, are you saying a breeder or somting started a test company and is giving phony results on their strains to sell em? I mean what advantage would there be to fudging those numbers for those companys.
Your right, I can't be certain they are flawed which is why I stated it would be cool to be able to check myself. Don't just read something, find something you disagree with and blurt it out, I asked a solid question. What is the equipment used, and how is it used. Why are you commenting if your not putting anything positive to the conversation? anyways maybe you haven't came across any companys that market their products better than it actually is but in my business I have. I wish I could be as trusting as you with no facts to back it up but I understand the concepts of marketing and business... I simply just want to know WHAT equipment is used, and HOW it's used. Maybe their is different methods to finding the THC content IDK and apparently neither do you. Ok so they pay big bucks to have labs check them,(still curious to how you know this for a fact) but they don't all send them to the same labs, so were not sure if their being tested the same or even if their using the same equipment.
Example: Say you want to take the average of a group of raw data points. Now you can go about several different ways to find an average and some will actually give you different answers even with using the same numbers. (Ayrthmetic mean, Weighted average, geometric mean, etc...)
So let me reiterate what I am asking; What is the equipment used and how? Im sure it costs out the ass and Im not really gonna purchase one, Guess it's just curiousity how the whole process works.
Thanks for the positive info cannawizard.
That's who i used and use. They do it on the spot and you even get a cool info card with your strain
Oh jeez.. They use GC/MS, or Gas Chromatography/Mass Spectrometry.. It is very precise. There is no reason to think breeders are making numbers up or that labs are using some high tech shit.. they use the same machine to do piss tests and a million other analyses..
are you kidding me here?? what reason would a company use to post fake numbers?? hmm, let me think about that for about half a second or so.. maybe because some people think that those numbers actually mean anything important and judge strains according to what percentage of thc that a company says it has or doesn't have maybe??
Originally Posted by Kaptain Kron
or course a lot of these numbers are way of base.. not to say that a gs/ ms aren't accurate, of course they are extremely accurate, but who is to say that these co's are actually paying to have their buds go through the tests and they aren't just making up their own numbers.. i've never seen any reports from company's who do this type of testing to show where they get these numbers from..
i take the percent of thc that the co's put up to be about as worthless as they estimates on yields and maturity rates... not worth a damn in most cases imo..
Originally Posted by timeismoney1
Able To Roll A Joint
Able to roll a joint
Have someone test it, it is not even remotely plausible to buy your own equipment, nor run a GC-MS, they don't just come with instruction manuals.
They are typically built to order and take months to receive and shipping a several hundred pound machine isn't cheap. Plus all of the standards you have to have to calibrate them, as well as the gas they operate on isn't very cheap, plus the chemicals it takes to extract the compound into an analytically viable sample. All of this also requires space and permits/certifications to set up, operate, and store. Takes about a month to get all the software working with the standards dialed in. Plus the cost of the machines is ~250k for a new one.
Labs, regardless of what it is they are testing are audited, by both internal and external entities, for safety, procedure, and data integrity. The cardinal sin in a lab is to submit knowingly false data and it can get a lab shut down extremely quickly. Plus the fact that most lab workers sign a confidence statement that basically makes any bad data the fault of the analyst-i.e. customers who have been cheated don't sue the company, they sue you and you end up in prison, and when you get out of prison plan on a new career, bad data will get you blackballed from a very large majority of any available laboratory jobs.
In short I am sure that the labs in operation submit quality data for their samples and are a much cheaper solution, I am sure they are accurate in their analysis. If you have questions about their accuracy most of them have certifications that they have to make available to the customer and are most likely visible on their website. http://fullspectrumlabs.com/validation/ is the method validation for Full Spectrum Labs, basically a written and approved method for the determination of the cannabinoid chemicals found in marijuana as well as the numbers to back it up, just grabbed that at a few second perusal of their site, I am sure their accreditation is there somewhere as well, by the way looking through their method validation these guys are on top of things. As to accuracy of the GC-MS, to borrow from Samuel L Jackson in Jackie Brown a bit-"When you absolutely have to analyze every fuckin chemical in the room...accept no substitute." These machines measure in ppt or parts per trillion, they are extremely sensitive and extremely accurate. At my lab you aren't even allowed to wear your labcoat from outside the GC lab into the GC lab because you can contaminate blanks just by being in the room with chemicals they analyze for on your coat across the room. Samples for GC analysis are not allowed to leave the GC lab due to the ability to pick up contaminants just from being around them. Plus the machines are calibrated whenever your quality control standards fail and the samples are rerun until you get passing results.
Sorry for the wall of text, just something I have a bit of experience with.
Last edited by Felder; 09-07-2011 at 10:29 PM.