this post was submitted on 15 Aug 2024
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It used to be standard in labs to pipette by mouth. Better be extra careful with the strong acids!
Whyyyyyyyyy. What the fuck, lol.
From what I recall from my classes taught by professors old enough to have personally done mouth pipetting (!), allegedly it was more precise and less likely to cause cross contamination than using rubber bulbs if you did it right. Which, nobody can be perfect every time, so thank god it was phased out. It really used to be the wild west out there.
I'm just amazed at the idea that a chemist would put anything in a lab near their mouth. Like, even ignoring acids, there are so many nasty chemicals that are toxic on a measure of parts-per-million or parts-per-billion that I'd be too concerned about accidentally getting a molecule on my lips. I remember reading about how dimethylmercury is so nasty that if you come into contact with it your only chance of survival is to grab a butcher knife and immediately hack off the contaminated limb (that's kinda hyperbole, but it's nasty shit).
Then you have basically anything that contains fluorine.
Maybe those were the days before they discovered the "instantly kill you dead with a single molecule" chemicals.
It wasn’t just the chemists either! There have been incidents where people in med tech labs have infected themselves with horrible and gross disease samples 💀