I have just been waken up by an alarm and found out that my neighbour did something terrible with his lighter. Luckily, there was no fire, only a plenty of smoke, and our flats were hermetically isolated, so that smoke didn't go to my flat. But, most probably because of my suspiciousness, I noticed some smell of burnt organic, which usually accompanies CO. I switched on ventilation and went out - just in case. There were no CO detectors in the house - only smoke detectors - my bad. Now the adventure is over (I hope so, at least) and I have got an (im)practical question:
Are there any ways to detect CO using only "kitchen chemistry"?