[CCIP]

I wonder to what extent airports are equipped with the neccesary tools for detecting something like this. And whether they're up to various ways of concealing miniscule doses of this.

My bet is that they probably aren't. Doesn't mean that we should all be running in a panic, I might be Russian living abroad but I don't expect that one of these will end up in my drink anytime soon. And, let's face it, there are so many ways that someone with resources could assasinate a person anywhere in the world, that spending huge resources on combating one of them so specifically is probably not even really worth it.
Once you do, they'll just pull out the next card from their stack.

The real issue is managing these things reasonably and minimizing risks, not going up in panic over it. How many of these air travel security issues have we seen in just a few months? It's all fine and good making air travel terror-proof, but not to a point where it gets passenger-proof along with it.