Chuck2 - thanks 4 the great link!!!
In response to the OP, the answer is a slightly qualified "Yes". There is an ideal ph value for ejuice containing nicotine. That value would seem to lie somewhere between 7 - 8.5 so far as I can tell from reviewing published research (& assuming the presented info is accurate - not always a safe bet with this subject). I do not go above 8, for purely personal, subjective taste reasons. How big a deal it is would depend on a whole list of variables. I see it as an important part of making my own ejuice, a part of the R&D phase - I do not check the ph of every single bottle of juice I crank out. But it is not an absolutely necessary part of DIY ejuice - plenty of people make great juices with no thought spent on final eliquid ph.
For myself, it seems important enough to shell out $10 for a digital reader; in my procurement priorities, it fell in just behind decent measuring tools (graduated glass pipetes, glass syringes, nic test etc). I started out using a ph/tds multitester pressed into service from the Wifes gardening tools, and she was glad to have it back.
My thinking on this subject went like this:
* Ph effects how efficiently alkaloids are delivered to the bloodstream
* common ejuice additives effect ph (alkaline & base)
* personal experience using more/less ml/day of different ejuice flavors with the same mg/ml of nic
* good cost-benefit ratio (cheap testing devices, low effort to test, many ph correction additives already on hand as flavoring additives)
If one were DIYing ejuice purely for personal economic reasons & thrift, this is not an absolute must. But for persons like myself, who enjoy tweaking stuff, researching, and feeling like I know what I am doing with/to my body, its a good fit.