I know I had decided I wasn't interested in providing support for this thread, but a trick that's worth considering: The easiest way to make 0.1N acid, is with acetic acid, which will work as well as mineral acids like HCl or H2SO4 when titrating nicotine.
How do you make 0.1N acetic acid?
Get some quality name brand white vinegar that's labeled as "diluted with water to 5% acidity". Vinegar acidity is expressed as wt/volume, so 5% acidity refers to 50 grams of acetic acid per liter of product. The normality of 5% vinegar is 0.8326. Vinegar acidity is tightly controlled during manufacture, especially among the better name brands because full potency is needed for it to do it's job when using it for pickling.
To make 1 liter of 0.1N acetic acid, dilute exactly 120 mL of 5% white vinegar to 1 liter with distilled water. To make 1 liter of 0.12N acetic acid, dilute exactly 144 mL of 5% white vinegar to 1 liter with distilled water.
If you screw it up, add oil and pour over salad.
I read and continue to read dvap's thread on nicotine content testing DVAP we owe a huge debt of gratitude for this information, vaporer & exogenisis thanks for supporting DVAP in ideas and brainstorming. Pornbjorg, thanks for starting this thread and putting where to get supplies for people. I already had purchased mine after reading DVAP's instructions. I have been buying liquid from several places and testing my liquid as it comes in also just to know who I want to buy from in the future. Again thanks so much for providing your time and knowledge and sharing this information. And we all owe DVAP alot for actually doing all these experiments and sharing his results at his own risk.
"12. Measure the final volume
13. Subtract 3 from the number you read in step 11
14. Multiply the result of step 12 by 19.4712"
Shouldn't it be:
12. Measure the final volume
13. Subtract 3 from the number you read in step 12
14. Multiply the result of step 13 by 19.4712
Reason I ask is that it's worded to subtract 3, and then never do anything with that new number (X=S-3)? Just curious!
If anybody is interested I bought a lt. of Bromothymol Blue and 10 - 10ml graduated cylinders off EBay.
I will sell anybody that is trying out DVaps titration method 2 - 15 ml bottles and a cylinder for $15 shipping included.
Just for my friends here though. Spreading the love of the JUICE, one vape at a time.
PM me if you are interested.
Last edited by DonleyDoRight; 12-18-2009 at 12:39 AM.
donley hey have you done this on some eliquid yet? I have on several brands. It is actually kind of fun and definately Very interesting and it is guiding my juice purchasing.
As a mater of fact, I have on many of my "store bought" liquids.
However on my home made juices they seem to be acidic so this method doesn't seem to work.
I need to do the math on using a .1N base titration test.
It works as advertised, to the tee.
DVap is without a doubt the MAN on this subject. We all owe him for his work and letting us all in on his work.
Thank You, DVAP! Thank You, Pornbjorg!
I have just done my first test, and boy-howdy it was exciting! The test was on some homemade juice, and I got a good/encouraging result for my first go at it. Made some mistakes, but the method is wonderful. Looking forward to my next trip down Lab-Coat-Lane!
I have a dumb followup question. What happens when the liquid you start with already has a color? My favorite vape is Tasty Vapor's Atomic Fireball. I was planning on mixing in some more nicotine to get a higher concentration and then use this method to verify.
The problem: That e-liquid is very yellow to start. What would I expect to see? Would it go green with the blue added, and then with the new acid added it would revert to a yellow color?
Rofl. You guys are great. I just vape until I get nicotine satifaction. Buying 24 or 36 mg and diluting to approx 18 mg with vg for better taste and vapor. Vaping has been self regulated according to satisfaction - ie - no longer chain vaping. Vape on my fellow vapers.