Dvap, I have a few questions about the testing.
1) Are there valid test to determine the various levels of WTA in it's various forms?
2) Are there labs that you know of that perform these tests and will publicly disclose the results?
3) Can someone like myself have these tests conducted?
4) How far in the future will the results of a test be valid for?
5) What is the frequency that random samples be obtained to consider the testing current?
6) Are the results of self-testing due any weight?
(I've edited your quote by adding numbers to the questions)
1. This question is a bit vague. There are testing procedures which rank from quite simple to quite complex. The amount of information to be gained is generally proportional to the complexity of the test. The more telling testing can easily go for $1000 per sample.
2. There are certainly labs that can perform the range of testing possibilities. In general, commercial labs aren't all that interested in doing this type of testing. They are generally set up to do specific protocols and tend to focus on their commercial, industrial, and governmental clients. Not to say one can't find a lab that will dabble in this sort of thing.
3. Anyone can have testing performed. The challenge, I think, is largely in engaging the interest of a lab to do it. Many, especially the larger operations, will find this sort of request to be a distraction from the sorts of things they focus on doing.
4. The result of any test is a snapshot. It applies to the material tested. This is why many lab clients send samples to labs on a regular basis... to obtain results over time. With some materials, the results are quite consistent over time, with others, there can be large variations.
5. I would say that with consistent manufacturing procedures and consistent starting materials, the results should maintain consistency over time.
6. The results of self-testing (such as nicotine or total alkaloid titration) are quite good if the procedure is performed correctly. I spent a good bit of time years back spelling out how anybody can figure out the actual levels in the e-liquid they buy. Generally, folks found it challenging to follow along.