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doesn't matter where, i would just keep it sealed [edit: dark]. teaspoon of vinegar per half cup oil is probably fine. a dash of salt wouldn't hurt, either. you can consider extraction completion to occur at an exponential rate. beyond a certain time limit, you hit diminishing returns. i don't...

jeffp: biochemist fresh on this thread. two suggestions, sorry if the second one has already been brought up before. keep the oil and buds dark and sealed. heat does not matter. remember, bud is a plant and obtains energy by photosynthesis. lots of molecules in that chlorophyll which love...

ok i think i'm about to go nerdfest. for homogeneity, we have two metrics 1. the sample size and 2. the number of bud bits in the sample. we can make a statistically sensible "homogenous" mixture like so - grind up 1 g bud ground to a consistency where 15-20 bud pieces fit in a PD bowl. dump in...

^ plus plus. no need to decide on vapes before agreeing upon the protocol. start with the PD, and use a joint and bong as your references. you can test other vaporizers as you go. GC, how is GC/MS reading going? in regards to tom's earlier qualms on variable bud potencies, these can be easily...

go for 500 ml. i pack PD bowls halfway for ample air flow and then just use it as a one-hitter. not too much drag.

Followup - I got the 500 ml EHLE after much deliberation. It was too good a deal to pass up for me (40$). After a few weeks with it, I love it! Good size for if you would like to bong with or without water.

May I recommend a book - Michael Brown's The Presence Process A how-to on finding and identifying with that observer by meditation.

absolutely. my attempt to explain chromatography below. chromatography refers to any technique for separating a chemical mixture. in order to conduct quantitative analysis (in this case, mass of each component), the chemical (vapor) must be separated so that each component may be assessed...

GC.. now that I think about it, i'm confused why you need to use anything but GC/MS. once you find parameters for a successful separation, can you not run replicates of each vaporizer gas? why do you find that impractical? MS is probably sensitive and specific enough for this experiment...

if you are truly an analytical chemist with free range over your set of analytical devices, please do GC/MS to analyze thc quantities in each vapor. for the heavy metals, i believe you may try quantitative analysis by way of ion-selective electrodes instead of icp-ms. cheers.

i was going to leave this alone since i'm too busy to get into an internet spat but i don't want anyone reading this thread to get worried. first, the link to the EPA website is an article from 1993. lead contamination was a more serious problem then due to older piping. lead actually hasn't...

looks like cherry to me

meh not really

when you say that we are always tripping, are you referring to the fact that we are usually not present in our daily lives? acid is my favorite drug, bar none. i'm still a kid (21) so nope.. wasn't around when all the pure acid of the '70s was available. sadly, today it really is hit or miss...

i got my bong a few days ago. first hit i took through it was hot water. i didn't know beforehand that hot water decreases the amount of visible vapor so i had a wtf moment for a bit. i read through this thread. doesn't seem like anyone came up with an explanation, although we all agree the hot...

I'm getting more and more sold on the HVY Mini Beaker. Seems like it is the right size, stable, and the downstem doesn't poke out so much.. negating the need for a shorter PD tube like with the EHLE.

Wow, I'm getting really excellent feedback. I remember your 100 ml youtube video being one of the primary reasons I bought this vape. I didn't know you had the other sizes as well. Say I fill the 500 ml EHLE with 250 ml of beads, making the volume difference between the two chambers (for the...

Thanks a bunch panasonic. I was thinking along the same lines but I guess I'm not as handy with the search function as I thought I was. So with the beads, I would see more condensation due to the greater surface area the smoke passes through before clearing the chamber.. but also denser hits due...

Hi all. I've been using the PD for a good 6 months or so now and my experience has been on par with the rest of FC (beyond fantastic). My intention since I bought it has been to buy a bong.. but I'm a college student strapped for cash, so it's taken some time to get around to making that...

I really appreciated your insight lwien. I actually wasn't able to find too much info on the power cord in this thread, and I had already tried searching before posting (maybe I was just using the wrong queries). However, I had a feeling the problem was in either the transformer or the wire...