Titration question - doesn't turn yellow

[Rsunderl]

Just started DIY'ing and testing my base. When I titrate, I can see the blue, blue-green, green, and green-yellow stages, but instead of the liquid turning suddenly yellow when adding a single drop at a time and swishing, it seems to suddenly turn clear.

1 - Am I doing something wrong?
2 - Should I use more indicator?
3 - Since it turns clear suddenly (within a drop or two), are the results based on the sudden change basically an accurate enough reading for the nic content?

Thanks in advance

 

[Das Auto]

Your titrating to determine your Nicotine concentration? What are you titrating your nic into? You say your "base", as in the Nicotine itself or your VG/PG mix?

 

[Rsunderl]

Yes, to see what nic concentration I have in my base liquid. By "base" I mean the nicotine liquid before mixing it with PG, VG and flavorings.

 

[r77r7r]

Utube.....................https://www.youtube.com/results?search_query=nic+Titration+

 

[Rsunderl]

Thanks r7. I watched a few of those and in the videos, the liquid turns yellow. However, when I do it, it turns from yellow-green to suddenly clear. Maybe I'm not using enought bromothymol blue or something. I use 6 drops. Don't know what I'm doing wrong as it happens within a drop or two. Never yellow, just suddenly clear.

 

[r77r7r]

Not the first one to have issue with the test around here. Seems tricky. Wish it was as easy as those PH paper strip things. Everyone doing DIY should be doing it, you'd think.

 

[Rsunderl]

Thanks again. I read some more, and it seems that since the change to clear happens within a couple of drops, the pH has also suddenly dropped, so maybe my reading of the nic level is at least close. Just wish I could be sure.

Maybe I'll add more blue the next time and see if that will give me a yellow stage.