Summary
Holly Bowles, a 19-year-old Australian, has become the sixth foreign tourist to die from suspected methanol poisoning in Laos.
She and her friend Bianca Jones fell ill in Vang Vieng, a popular backpacking town, after reportedly consuming tainted alcohol, which can be lethal even in small amounts.
Other victims include a British lawyer, an American man, and two Danish women. Methanol, often found in bootleg or home-distilled alcohol, is believed to be the cause.
Authorities are investigating, with the manager of the hostel where free shots were served detained for questioning.
You can test for methanol in various ways during destillation. But also you don’t need to test for it, if you control your temperature properly and discard a sufficient amount at the beginning.
Even if you would not discard anything, if you fill all your destillate in one container, so ethanol and methanol mix again, it decreases the effectiveness of the methanol.
Methanol itself is not directly toxic. The damage is done by formaldehyde and formic acid that come from your body metabolising the methanol. Methanol gets metabolized on the same routes as ethanol, which the body favors. So one way to treat methanol poisoning is by ingesting untainted ethanol.
https://en.wikipedia.org/wiki/Methanol_poisoning
All fermented drinks contain both ethanol and methanol. But because the ratio is not altered with bad distillation, you wont get methanol poisoning from untainted beer or wine.