So I recently had a very enjoyable experience with this chemical. Thought I would write out how I prepared it, since it was fairly involved. Hope this is useful for others!
First: MATH
I wanted to create a solution that would contain 500 μg per 100 μL of solution. The math for this is 5 mg of Free base dissolved into 1 mL of solvent.
The steps I followed:
I measured 5 mg of Free base 25 I.
I added this to a small, 25 mL, beaker.
I added lemon juice, purchased from walmart, 100 μL at a time. It took 200 μL total to cover all of it.
I then added 800 μL of distilled water.
I placed the beaker with the solution on to a hot plate, and very slowly increased the heat while swirling the solution.
I set the hot plate to the lowest setting, swirled for about 2 minutes, checked how dissolved it was, then repeated, increasing the heat 1 level each time.
After getting to level 3 on the heat plate, and swirled for a few minutes, the free base was complete dissolved.
I dosed myself nasally with 100 μL of solution, using a P1000 micro pipettor. I swirled the solution thoroughly before pipetting the 100 μL. This was only slightly irritating/painful. The pain was totally gone after 5 minutes.
After about 30 minutes, I decided to re-dose with 50 μL.
The experience was very enjoyable, and not too intense by my standards. But also, the come down was almost instantly. The experience changed from fairly intense hallucinations to no hallucinations at all, in a fairly short period of time.
Here is a pic of the stirrer I used:
http://www.sci-support.com/images/300/1431.jpg
Pic of the pipettor:
http://www.bio-rad.com/webroot/web/..._supplies/sku_thumb/global/166-0508BLK_tn.jpg
the scale I used:
http://www.scalenet.com/ohaus/adventurer/adventure+pro.jpg
The equipment I used is lab-grade, and fairly expensive. I have access to this equipment because of my school and work background.