eCigTalk.ru - Powered by vBulletin


TopOfVape.ru: ЖИЖИ для НАРОДА от 120 руб./100мл, LG HE4 270р., Suorin AIR 1050р. СДЭК от 1000р. без предоплаты, СПб беспл. ПВЗ.
Дистрибьютор jija: Оптовые цены производителей! Zombie Party 120мл - от 235р, Cotton Candy 120мл - от 165р, BOSHKI 100мл - от 235р +100 брендов.
iCigarette.ru: Самый большой он-лайн магазин жидкости для электронных сигарет в России. Больше 100тыс. вариантов! 30мл и 6х6мл за 1 руб! Код 10% скидки ecigtalk

RSS лента

Peter_lz

Определение концентрации никотина титрованием H2SO4

Оценить эту запись
Supplies Need

-eLiquid Nicotine Test Kit which contains:

(2) 3ml syringe with 0.1ml graduations.
A white 8 oz plastic cup.
.12N Sulfuric Acid (referred to as ‘acid’ in the document)
Bromothymol Blue (referred to as ‘blue’ in the document)
Note: The calculations in the instructions only work for .12N acid. They will not work for .1N acid sold by other vendors

-Distilled Water

The Procedure

Rinse all supplies well with distilled water a couple times.
Use a small accurate syringe to measure EXACTLY 1ml, 2ml or 3ml of eliquid. (detach the needle from the syringe when measuring the eliquid) See next section for more information on which amount to use.
Put the measured amount of eliquid into your cup/glass.
Add about 10-15ml distilled water to the cup/glass. This amount does not need to be precise.
Add 6-8 drops of blue.
Swirl solution in cup/glass to mix well.
Using a new syringe, with a small gauge needle attached, measure EXACTLY 3ml of .12N Acid. Tap out any air bubbles in the syringe for more accurate reading. (Do not use the same syringe you used to measure your eliquid)
Slowly add the acid from the syringe to the nic/blue solution, stopping and swirling the cup/glass in between little adds at a time.
When you are getting to the yellowish-green color, the test end is near, so now its time to get more precise when adding the acid via the syringe 1 very small drop at a time.
Keep repeating above steps, add then Swirl, until the solution turns all yellow. (If the solution starts looking clear, and the yellow is hard to see, then add an extra couple drops of blue)
Make note of how much acid is left in the syringe. Subtract that number from the starting amount of acid originally in the syringe (3ml). This is how much acid you added. (note: if you had to 'refill' the syringe because you ran out during the test, don't forget that amount) (example: I'm using a 3.0ml syringe. I measured EXACTLY 3.0ml of acid and use all of it in the mixture. I added EXACTLY 3.0ml more acid to syringe. Adding the acid, the mixture turned yellow, and there was 1.8 ml of acid left in the syringe. So I used a total of 4.2ml of acid in this test)
If you used 1ml of eliuqid, Multiply this number by 19.47.
-If you used 2ml of eliuqid, Multiply this number by 9.735.
-If you used 3ml of eliquid, Multiply this number by 6.49.
-Or compare that amount to this pre-made chart.
The resulting number is the mg/ml. (example: 4.2x19.47 = 82mg/ml. ... round to the nearest whole number)

Notes/Tips/Tricks

Testing 1ml of eliquid carries a +/- 2-4mg margin of error, and is recommended testing eliquid strength greater than 36mg. (uses least amount of test solution)
Testing 2ml of eliquid carries a +/- 1-2mg margin of error, and is recommended testing eliquid strength 18mg-36mg.
Testing 3ml of eliquid carries a +/- 0-1mg margin of error, and is recommended testing eliquid strength up to 18mg. (uses most amount of test solution)
When adding the acid and mixing, the color will go from blue to bluish-green to green, to yellowish-green, to yellow with still a tint of green, and when you've reached the 'magic drop', it will turn all yellow. If you are using a clear glass, place it on a white piece of paper to see the color change easier (not needed if using a white plastic cup). Using a white plastic cup makes seeing the color change easy.
If you added to much water in the beginning, or testing very high strength NIC, then you will notice the yellow becomes very hard to see. Its almost clear. If this is the case, just add more blue, and it will make the solution darker, and easier to see.
If you are testing 1ml of NIC Juice, then with about every 1 ml of acid added, that will be around 20mg of nicotine be tested. So if you are testing eliquid that should be 50mg, then it is pointless to repeat steps 8-10, a little bit at a time in the beginning. I’ll bulk add like 2ml of acid initially, then mix, then do it at 1 or 2 drops at a time after that.
If you are testing 2ml-3ml of NIC Juice, then with about every 1 ml of acid added, that will be around 7-10mg of nicotine be tested. So if you are testing eliquid that should be 24mg, then it is pointless to repeat steps 8-10, a little bit at a time in the beginning. I’ll bulk add like 2ml of acid initially, then mix, then do it at 1 or 2 drops at a time after that.
You can do the test a few times and average out the results if needed. As you do the test several times, you’ll get a feel for it, and become more accurate.
Before using your syringes, put some clear nail polish over the black numbers, and let dry. This will protect the markings so they don't eventually wipe off after several cleanings.

eLiquid DIY Nicotine Test Kit
Метки: Нет Добавить / редактировать метки
Категории
Без категории

Комментарии

  1. Аватар для Thyratron
    дешево и сердито.
    и химикаты все доступные...
    утащил сцылку к себе в нору

Условия предоставления информации | Отказ от ответственности

© eCigTalk.ru 2010-2019