Here's an article which covers some aspects of nerve agents:
https://www.theguardian.com/uk-news/201 ... ei-skripalI can say from my own experience that in a potential NA environment we used to wear quite light, charcoal impregnated, full coverage NBC (Nuclear, Biological, Chemical) suits, over the top of our normal combat kit. That, plus a respirator of course. You knew when you had been in that lot for 12 hours or so, especially in the summer months.
There were various blotting paper type patches which detected the presence of any toxins, persistant and non-persistant. You taped these to your suit arms and legs in clear sight. They changed colour when contamination was present. Around your waist you carried a set of cylindrical devices in a wallet. They were called Autojects. If you started showing the initial symptoms of nerve agent poisoning you would get one of these out, press it very firmly into the top of your upper leg and push the end button. This fired a 2" needle into the big muscle there and injected a large dose of atropine. This was an act of faith because if you got it wrong then instead of countering the agent the atropine would kill you.
You also had a container of what was basically high-end talcum powder (Fuller's Earth) which you could apply to any areas of contamination on your suit to soak up the droplets of NA - which can then be brushed off before you go home to tea.
As well as that we carried individual packets of quite large oxime tablets. The atropine slows down the effects of NA poisoning and the oxime tablets taken afterwards effectively counter it (theoretically
). Again, the stuff is quite toxic in its own right and can seriously screw you up. Good luck!
I've heard it said a few times that these agents are a piece of doddle to concoct. It wasn't at all the impression I got and does seem to beg the question, why don't we see them a lot more being used by relatively well funded/equipped groups, like ISIS? Not for ethical reasons, that's for sure.