Increasing/ decreasing nic: A formula?

[Badical9]

I have a bunch of free sample juice from MBV and I was wondering if anyone had an easy formula for increasing or decreasing the nic to a certain level.

Heres an example: I have a 15ml bottle at 12mg strength. I'm guessing out of that 15ml bottle there is actually 10-12ml left in it after sampling and what not. My desired nic level is either 18 or 24. I have a jug of 100mg nic so I'm wondering how much I should add. This sounds like a word problem from middle school haha.

I'm not looking for how much to add, just a formula for how to figure it out. I'm sure there will be other circumstances where people will want to change nic levels but not have the exact ml/mg juice. Thanks in advance for your help!!!

 

[LucentShadow]

Hi. There are a couple of ways to do this outlined in the thread linked to below:

http://www.e-cigarette-forum.com/fo...reasing-nicotine-store-juice.html#post7339558

I'm still not sure if any of the e-juice calcs will do these problems, but I'd guess that some might.

An easy way to think of it is to figure the total milligrams of nicotine and the total milliliters of liquid, then figure the result. Plug in a few numbers, and you can narrow it down.

12ml of 12mg/ml = 144mg of nic in 12ml
+
0.88ml of 100mg/ml = 88mg of nic in 0.88ml
=
12.88ml of 18.01mg/ml = 232mg of nic in 12.88ml (232/12.88=18.01)

 

[Doc Diego]

Solving Lucent's link:

(Sf-Ss)*Vs / (Sa-Sf) = Va

Sf is final strength, Ss is Starting Strength, Vs is starting volume, Sa is strength of Additive, and Va is Volume of additive required.

12 of 12, and adding 100mg per ml to get 24mg/ml looks like:

(24-12)*12 / (100 - 24) = 144 / 76 = 1.895 ml

Which matches the chart I crunched quickly:


To start from the beginning:

Ss*Vs + Sa*Va = Sf * (Vs+Va) -- Calculate mgs of Nic in variables
Ss*Vs + Sa*Va = Sf*Vs + Sf*Va -- Multiply out
Sf*Vs+Sf*Va = Ss*Vs + Sa*Va -- flip the sides
Sf*Vs- Ss*Vs +Sf*Va = Sa*Va -- subtract Ss*Vs from both sides
Sf*Vs-Ss*Vs = Sa*Va - Sf*Va -- subtract Sf*Va from both sides
Vs*(Sf-Ss) = Va*(Sa-Sf) -- factor volume out on both sides
Vs*(Sf-Ss) / (Sa-Sf) = Va -- divide both sides by Sa-Sf, and we have the equation to solve the dilution problem.

 

[JD1]

The Ejuice Me Up calculator has a screen that helps calculate mixing up to 3 different mixes together. It's under the tools menu.

 

[Badical9]

You guys all rock!! I felt dumb for not being able to figure this out in 2 minutes and giving up but now I'm smart again!!! But seriously I really appreciate everyone's help, I can now make sense of this

 

[Onceupon]

n = (n1m1 + n2m2) / (m1 + m2)

Where n is final nicotine strength in mg/ml, n1 is strength of first sample, n2 strength of second sample, m1 is quantity of first sample in ml and m2 quantity of second sample.

Rearranging to find an unknown quantity of one sample, we get:

m2 = (m1(n - n1)) / (n2 - n)

To simply calculate how much nicotine base to use in a mix:

m1 = nm / n1

Where m is the final quantity.


It is also possible to calculate how much nicotine base and flavouring concentrate to add to an existing mixture in order to reach a desired nicotine concentration, without changing the flavour at all.