How much nic to add?

[Zutankhamun]

Hi. Somebody has asked if I can make their 30ml (I think) bottle of 0 nic ejuice that was bought by mistake into 14mg.
How would I do it?
Would I empty some juice and then add nic or put the nicotine on top.

I wouldn’t usually ask and just throw in 6ml of my 70 nicotine and get on with it but as it’s a favour I should do it properly.

Thanks

 

[Letitia]

I would take some out, add nic, shake, pour rest back in and shake. Or just put it in a beaker if you have a hand mixer.

 

[Izan]

Hi Z,
HTH

Cheers
I

 

[NatashaTMT]

6ml or 6.22 grams. I’d suggest mixing in a beaker or larger bottle.
Edit: I 2nd bwh79’s second comment.

 

[bwh79]

my 70 nicotine

I'll assume you mean 70mg/ml nic base. Remember those "word-problems" we all hated in math class? Here's where they come in handy.

"Zut has 30ml's of 0mg/ml e-liquid. How much 70mg/ml nicotine base should he add so that the resulting mixture is 14mg/ml?"

Now we need to turn this into an equation that we can solve. What are we trying to do? We must add "some amount" of nic base, so that the amount of nicotine we add, in mg, at 70 per ml, is 14 times the total volume in ml, once we're done adding. We don't know how much "some amount" is, yet, so we'll just call it "x". So to start out, we add "x" number of ml's of nic base, with 70mg of nicotine in each ml, that's x*70 or 70x total nicotine. We'll put that on one side of the equation:

70x = ??

Now, on the other side, we have the finished product. We started with 30ml's, and we added "x" more so there are 30 + x ml's. But we're not talking about ml's of liquid, we're talking about mg's of nic. In each one of those ml's of finished product, there are 14mg's of nic. So the total nic in the finished product is 14*(30 + x). Let's put that on the other side:

70x = 14(30+x)

Great, now we have an equation. The left is how much nicotine there is if you add "x" ml's at 70mg/ml. The right is how much nicotine there is if you have "x" plus 30 ml's at 14mg/ml. All we have to do is solve for x:

70x = 14(30+x)
70x = 420 + 14x
70x -14x = 420 + 14x - 14x
56x = 420
56x/56 = 420 / 56
1x = 420/56

[[ x = 7.5 ]]

You should add 7.5ml of 70mg/ml base to 30ml of 0mg/ml liquid for a total of 37.5ml of 14mg liquid.

Check: 7.5ml * 70mg/ml base = 525mg nicotine added (total, since we started with zero).
525mg / 37.5ml liquid after adding = 14mg/ml concentration in the final product.

 

[bwh79]

Oh yeah, if you want to pour some out first I guess it's a lot easier. If/since you want 30ml of 14mg/ml, you just want 420mg nic in the bottle. Which is achieved with 6ml of 70mg nic. So you pour out 6ml, add 6ml of nic base, and you have 420mg in 30ml = 14mg/ml. Easy peasy. Should have read closer before I showed you the hard way

 

[Fredman1]

I'll pour it into a 50ml bottle and use this formula...

If some is poured out and nic with pg/vg is added, some flavour will be lost....

 

[Zutankhamun]

@Fredman1

Hi Fred.
Excuse me, I’m on the dim side where numbers are concerned.
If I used your calc I would still only add the 6ml of 70 nicotine?

 

[Zutankhamun]

That can’t be right. I’ve made a mistake...

 

[NatashaTMT]

I’d recommend plugging your info into a juice calculator. It might help to see it. 6 ml is accurate if your end amount will be 30 ml. But since you need to add nic to 30 ml, I think you need 7.4 ml of nic. Or you can remove 6 ml of liquid from the 0 nic juice and add 6 ml of your 70 mg nic. I’m going against the grain and I might be wrong but feel I should share what I believe is right. I was hesitant because I don’t want to confuse.

 

[Letitia]

6ml of your 70mg is correct, you just may need a larger bottle since after mixing you will have 36ml of juice.

 

[bwh79]

6ml of your 70mg is correct, you just may need a larger bottle since after mixing you will have 36ml of juice.

No if he’s not pouring out first, but just adding to the initial 30ml, then he needs to add 7.5 (see my long post above). 6ml is for 30ml total which means he needs to pour out 6ml first before adding he 6ml nic base.

6ml * 70mg/per = 420mg; in 30ml = 14mg/per (pour out 6ml of zero-nic, then add 6ml of nic base to remaining 24ml)

7.5ml * 70mg/per = 525mg; in 37.5ml = 14mg/per (add 7.5ml nic base to full 30ml)

 

[Letitia]

No if he’s not pouring out first, but just adding to the initial 30ml, then he needs to add 7.5 (see my long post above). 6ml is for 30ml total which means he needs to pour out 6ml first before adding he 6ml nic base.

Yep 7.2ml for 36ml 14mg. Forgot to add the 6ml in calculator. My calc came up with 7.2 but at 14mg the .03 would be negligible if he went with the 7.5.

 

[NatashaTMT]

I used 70/30 VG/PG ratio. Your PG percentage will be thrown off a bit but I wouldn’t be concerned.

 

[Letitia]

I use ELR with the same numbers and came out to 7.2. Oh I know what I did.

 

[NatashaTMT]

I use ELR with the same numbers and came out to 7.2. Oh I know what I did.

I gave the wrong answer the other day (further up). Or more, incomplete answer. I wasn’t thinking about it being different if he wouldn’t be ending with 30 ml. Sometimes I race around without slowing down to think long enough to catch my mistakes.

 

[go_player]

Hi. Somebody has asked if I can make their 30ml (I think) bottle of 0 nic ejuice that was bought by mistake into 14mg.
How would I do it?
Would I empty some juice and then add nic or put the nicotine on top.

I wouldn’t usually ask and just throw in 6ml of my 70 nicotine and get on with it but as it’s a favour I should do it properly.

I think your instinct is right. I am very precise when I mix, and that matters sometimes when using certain powerful flavors. But a percent or two here and there hardly matters when it comes to nic, especially when you're aiming at 14%. Rule of thumb calculations should be fine here.

I'd only throw away juice if you need to to make room in the bottle for the nic. I'm not used to doing back of the envelope math around 70mg (that's an EU thing, and I'm in the US) so I won't bother to check your math, but yeah, back of the envelope math is fine for doctoring juice with nic as long as you get the math roughly right.

 

[Zutankhamun]

Yeah. Followed the initial thought which many here agreed.
It was ‘just right’ apparently.