There may be a simple way to asses the extraction of a substance after two pulls. Sorry of this has been posted before already (I cannot find it).

Let's assume that two pulls are done under your preferred condition (same conditions for both pulls) and you measure the yummy product you get from each, let's call M1 the mass obtained from the first pull, and M2 the mass obtained from the second pull. Let's also assume that enough solvent was used to avoid saturation so water/solvent are in partition equilibrium.

Interestingly with only these two numbers some cool estimates can be done. For example, the total amount of material (Mt) in the place your are pulling from (water, paste, plant matter, etc) is,

**Mt = M1^2/(M1-M2)**

You would need infinite pulls to get it all. What if you want to get 90% of it, how many pulls do you need? The answer is in the plot below, where the fraction of product that moves into each solvent pull is:

**p = 1- M2/M1**

Just figure out what the p is, and look up how many pulls are needed to land in the green zone where the total fraction of product pulled (labeled Rn) is above 90%. For example, if you are pulling some bufotenine from dry Ca(OH)2 baked yopo seeds and M1=350mg and M2=210mg, then p = 1 - 210/350 = 0.4, and five pulls are needed to get to the green area. You also know that there were Mt = 350^2/(350-210) = 875mg of extractable bufotenine in your yopo paste to begin with, and that after you complete 5 pulls you can expect to have a have a total of ~ 800mg π

In general you want to make M2 <<< M1, this means you have an efficient pulling technique. Try adding salt to the water, adjusting the pH, or even temp. and see how low you can get M2/M1. You may want to invest time to get to p = 1 - M2/M1 > 0.3 instead of just repeating the same pull over and over. Have fun!

Any credit goes to Elrik for posting this kind of data

here.

Disclaimer: these formulas have not been thoroughly vetted and checked. I could have made an error. They will be updated if needed. Also, these are only gross approximations. After 3 or more pulls a fit to the data can be made which is more accurate. Also, they assume that the solvent is not saturated in the first pull and are only valid during the part of the extraction where solvent is not saturated with product.

Loveall attached the following image(s):

IMG_20181219_100149.jpg

(23kb) downloaded **380** time(s).