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Simple, easy DIY test for mg/mL nicotine. A Follow Up on DVAP's Method

Discussion in 'DIY E-Liquid' started by Þornbjörg, Oct 19, 2009.

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  1. pimpe

    pimpe Senior Member Verified Member ECF Veteran

    Aug 19, 2011
    i can only find 0.02N Sulfuric Acid. can i used that instead?
  2. VapRon

    VapRon Super Member Verified Member ECF Veteran

    Apr 6, 2011
    Hi all,

    I was wondering if I could use Reverse Osmose water (R/O) which is 98.3 pure since I produce that for my Aquariums.
  3. Youmadbrah

    Youmadbrah Super Member ECF Veteran

    Nov 15, 2011
    I don't understand this

    9-Add a drop of acid
    10-Swirl to mix
    11-If the color of the solution didn't turn pale yellow, repeat 8-9
    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

    Should I subtract 3 from the final volume then multiply by 19.4712 ?? Didn't u mean subtract 3 from number I read in step 12 ??

    And btw , the 0.12N SA is dead. Here is the right one
  4. Malawi

    Malawi Full Member Verified Member

    Feb 18, 2012
    Does it matter weather the Bromothymol Blue is in 0.1, 0.04 or other concentration, or does the higher solution only give more colour?

    Normally it only says Bromothymol Blue solution, without any indication of the concentration. Is there any possibility that BB from different vendors may give different results?
  5. mjradik

    mjradik Senior Member Verified Member ECF Veteran

    Sep 8, 2011
    Columbia, MD
    THe blue concentration shouldn't matter. I've done the test with alot of blue (making it more concentrated) and doesn't skew it. I did 25 drops blue to 1 ml nic... thats alot. Gives alot more color. So .1 consentration should be fine.
  6. tsunami987

    tsunami987 Senior Member Verified Member ECF Veteran

    Jan 2, 2012
    Metro East STL
    Tried to do some research on some older rainbow pool chem test bottles which I bought... Thought it'd be the right stuff. Then I read that one little part of the op that said not to use total alkalinity test chemicals. The stuff I grabbed is "solution 3" Acid Demand and Total Alkalinity. If my test proved to be right, my nic would be 154mg... I bought 50. Gonna have to wait for the other pool supply store to get the right stuff in before I use this juice at all, lol.
  7. Koman

    Koman Moved On ECF Veteran

    Jan 7, 2010
    I think you can!
  8. Scottinboca

    Scottinboca Vaping Master Verified Member ECF Veteran

    Oct 14, 2011
    Planet Vapton
  9. MegaVaper

    MegaVaper Senior Member ECF Veteran

    Jul 4, 2012
    How yellow is pale yellow? will it turn a little yellow until it turns pale yellow, or will it just go directly to pale yellow after enough acid.

    Edit: Ive just conducted 2 test. tools - SA 0.1N from wizard labs, BB 0.04 AS from wizard

    Test 1: on 100mg/ml pg nic from wizard labs. Result 5.4 x 19.47 = 105.138
    Notes: Started almost clear or pale yellow, turned light blue, acid turned it back to its original color. Light blue and pale yellow here where so hard to tell apart as both were almost clear white.

    Test 2: on 16mg/ml Pg vanilla from Bloog. Result - i cant *u*kin* tell =[
    Notes: This vanilla is a very dark brown. Lighten up alittle with the water and the blue. Looks a like a lighter brown. Started to add acid... Never really turned pale yellow. The shades of brown just kept getting lighter and lighter almost to pale yellow, but could easily just be another shade of brown.

    Remarks: There has to be a better way...maybe i will just try it with water instead of acid. Since most liquids are brown im sure ill get the pale yellow.
  10. Rocketman

    Rocketman Ultra Member ECF Veteran

    Adding more blue will increase the color density.
    Pale Yellow is the total absence of Green :)
    The solution will go from blue to green to no green. Not even a hint of green :)

    Flavored juices may impact the acidity in addition to masking the color.

    Getting 105mg/ml result from 100mg/ml is exactly what the test is supposed to do.
    Measurement accuracy of the Nic added, the volume before the acid, and the volume of acid added, and the yellowness of the yellow impact test results.

    If you make 1% accurate measurements, have the solution 'blue enough' you may be able to get within about 3% of the true value. Maybe. With a pH meter and .1% measurements maybe +/-1%.

    BTW, I got about 98.5mg/ml from mine .
  11. Koman

    Koman Moved On ECF Veteran

    Jan 7, 2010
  12. renegade13

    renegade13 Full Member

    Feb 24, 2013
    panama city fl
  13. mrcoolbp

    mrcoolbp Senior Member ECF Veteran

    Stand back, I'm gonna try some Science:evil:! (Love that!)

    Okay, tested a labeled 36mg/ml sample. Came out to 33.1mg/ml ~90% accuracy. Not bad:2cool:. Pics for those interested follow.

    Here is the sample just before it indicates yellow:

    And two more drops of H[SUB]2[/SUB]SO[SUB]4[/SUB] yielded:

    Notes: the original instructions aren't worded exactly as someone pointed out but if you follow the example it will make sense. Also I tested "House Blend" from CopperCreek which is a medium brown eliquid with no problems discerning color, so it can be done (possibly depending on how dark in color your sample is or presence of acid).
  14. LoriP1702

    LoriP1702 Ultra Member Verified Member ECF Veteran

    Supporting member
    Please forgive me if this is a totally stupid question, but do I need to do this testing if I'm purchasing the nicotine already mixed with VG?
    I purchased from WL, so I was hoping I didn't. :(
  15. mrcoolbp

    mrcoolbp Senior Member ECF Veteran

    From what I gather, most liquids are testing as they are labeled, but I've heard reports of a few that didn't. Luckily, Wizard Labs is well respected around here so you should be alright. I just like to be safe especially with higher concentrations where it can get dangerous.
  16. LoriP1702

    LoriP1702 Ultra Member Verified Member ECF Veteran

    Supporting member
  17. VClouds

    VClouds Super Member Verified Member ECF Veteran

    Jun 4, 2011
    Just stumbled across this and thought it might be interesting to those that don't want to track down all the bits and pieces themselves.

    Wizards Labs (one of our trusted nicotine suppliers) is having a sale on a complete test kit here.
    Nicotine Test Kit
  18. Koman

    Koman Moved On ECF Veteran

    Jan 7, 2010
    Thanks for the link. Useful!
  19. Johnnysb
    This message by Johnnysb has been removed from public view. Deleted by a moderator, Jan 22, 2014, Reason: Linkspammer.
    Sep 27, 2013
  20. peejglass

    peejglass Full Member

    Nov 14, 2013
    Awesome write-up. I'm going to be doing some DIY soon.
  21. dahlialady

    dahlialady Senior Member ECF Veteran

    Nov 2, 2013
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