Recent content by GC

With all that was said about user dependent variables it's indeed going to be hard to make a "standard" measurement comparing different vapes. Especially for efficiency. I think that a good starting point will still be testing unloaded vapes for any chemicals emitted by the device itself such as...

Well, I'm interested in this kind of experiment because I want to know what exactly I'm taking into my lungs and If there is a significant difference between uptake methods and devices in terms of active ingredients and hazardous substances. But, the fact that I'm interested in it will not be...

You've given me lots of food for thought here and I'm grateful for it. It underlines the fact that the design of the experiment down to fine details will be crucial for the results to be useful. I'm in the process of reading a bunch of papers and I hope I'll be back with some conclusions soon...

I wasn't aware that the trichomes settle. I just pick a bud and cut it with scissors into my joint. How about grinding the full amount for the whole experiment and dispensing it (fixed weight) from a large "salt shaker". Then I can take random single portions and check for consistency by...

I have lots of catching up to do but I'll start with Purple days vape selection post. Thanks for this post Purple Days. I'm skeptical that I can run such an extensive survey because the costs will be too high so I really would like to get from you the 5 most important vapes to test. I think...

Thank abhs. I'm a physical chemist and this experiment is more of a personal thing and totally not within my direct expertise (optics and microscopy). However I will have access to most analytical tools available and I intend to do this so I'm learning... GC-MS sounds good (not only for THC)...

Thanks for your comments. At this stage I'm not ruling anything out and I'm lucky to have access to all of these machines (although some will require more funding than others...). ICP-MS will probably be needed for heavy metals and I just read a volcano paper where they used quantitative NMR for...

Gas phase FTIR is going to be tricky but not out of the question. I really have to get a better idea of what GC can give in terms of analyzing all the toxins.

I think the main tool will be a gas chromatograph but I will have access to any kind of analytical tool including mass spectroscopy and any kind of elemental analysis. The way I thought of doing this is to have a pump suck vapor into the machine until the deal is done and quantify the amount of...

Hello, I am a physical-chemistry Ph.D and recently got an academic faculty position and will have my own lab. I have been smoking on a daily basis for the last 15 years, although since becoming a parent (last 5 years) I have only been smoking a nightly joint after the kids go to bed. For a while...