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{cannabis}
joined jul 2015
manifesto
A little biggy devoted to everything cannabis :)



Except items here on little biggy! That's going to be interpreted as spam by our borg.




There are many pages for that stuff including where to buy marijuana online
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251 topics on {cannabis}
Sukhy96
by  Sukhy96
Vendors sending substitute items
Gunitbiggy
Best flower vendors?
theStrokes
The Science of Marijuana with Neil deGrasse Tyson
young mula
What is the best DIY bong?
Vivz1992
by  Vivz1992
Want to buy 1g hash only
mim
by  mim
High Times Top Strains 1977
Cmac1985
by  Cmac1985
Any other canna moms here on LB?
Distilate
BudBoy1980
water has returns
since71
by  since71
biggaz breath hacks?
+7
24601
by  24601
deep dive on cannabis tests
im always impressed by the expertise around here so im wondering if someone can explain what cannabis testing exists and how it works:

eg how do impurity tests work for edibles?

how is thc measured exactly?

what other tests exist?
+6
wells
thc/weight is measured by High Performance Liquid Chromatography (HPLC). basically they measure light absorption from cannabinoids.

good explanation here:
+4
Extracter
Hi, the main method for cannabis testing has been chromatography which is the process of separating compounds of a sample into individual weights and measuring the results against known reference standards of known concentrations and weights.

We use a Gas Chromatograph with Flame Ionization Detector (GC-FID) which vaporises the sample and pushes it through an ultra thin polarity matched column which then ionizes the molecules adding a charge and then they are run through a magnetic field and then the detector measures the weight accordingly as in heavier molecules will bend less to the magnetic field, it then records the data on a graph, response vs time, when the reference chemical standard is used its response and time is recorded to calibrate the machine and samples can be measured against it, for their concentrations and identification.

An HPLC-MS High Performance Liquid Chromatograph coupled with Mass Spectrometer is the most accurate in general. The Liquid Chromatograph does not vaporise the sample and tests the liquid form which has advantages and disadvantages when testing cannabis, for instance terpenes due to their volatile nature have been better detected on a GC. Testing for THCa, CBDa the acid form of the organic molecules can be done mainly on a LC.

All these methods are great provided the sample is prepared correctly and all your compounds of interest have extracted efficiently in your solvent. With different types of samples different methods of prep need to be employed as what the sample is can inhibit accurate results.
+2
wells
thanks that's a terrific answer
Cannabis consumer healthier than their peers
heligoland
how do we know vapes on LB are legit
Origins of Cannabis
how to find the right strain?
ike
by  ike
resin vs rosin?
Spudulika
by  Spudulika
Indica Vs. Sativa - is it all BS?
ever heard of an indica called MVA? (Project Twenty21)
Mokum
by  Mokum
There was a clear winner on election night: Marijuana
Gwarren85
by  Gwarren85
Help choosing non paranoia strain
jjfury
by  jjfury
Small orders
theMets
by  theMets
easiest vape to keep clean?
cannabis and exercise
illirum
by  illirum
RIP Frenchy Cannoli
Good ways to reduce weed smell
Growers Advice. LED's?
Agent Blue
Mangos do they make you more high?
Best places you've smoked?
BudBoy1980
Kief tray reccomedation
Hash Experts please school me
Earliest known signs of cannabis smoking unearthed in China
Boveda packs in your regular stash jar?
Robbiep686
Fancy being a vendor
1620
by  1620
Terpine Profiles
edibles error tales
illirum
by  illirum
Scientists brew cannabis using hacked beer yeast
Deez_nuts
by  Deez_nuts
Foreigners to be banned from Amsterdam weed cafes
BudBoy1980
Scots get leagal weed farm!
Khuunntt
by  Khuunntt
Sadiq Khan to launch review into decriminalising cannabis in London