Sure, some will say that e-cigs contain ingredients present in anti-freeze.

So supposedly the US and British found evidence that Syria had used sarin, but refused to divulge the details

2:45 p.m. ET - Sen. Bob Menendez: "We know that chemical weapons personnel from the Syrian Scientific Studies and Research Center – subordinate to the regime’s Ministry of Defense – were operating in the Damascus suburb of ‘Adra from Sunday, August 18th until early in the morning on Wednesday August 21st near an area the regime uses to mix chemical weapons including sarin and human intelligence as well as signal and geospatial intelligence have shown regime activity in the preparation of chemicals prior to the attack, including the distribution and use of gas masks.

We have multiple streams of intelligence that show the regime launched a rocket attack against the Damascus suburbs in the early hours of August 21st and satellite corroboration that the attacks were launched from a regime-controlled area and struck neighborhoods where the chemical attacks reportedly occurred clearly tying the pieces together. That is what we know in terms of who may have deployed these weapons.