And in case you're tempted, you may want to think twice before drinking that ultra-pure, 18 MOhm water you have handy in the lab: http://www.who.int/water_sani

And in case you're tempted, you may want to think twice before drinking that ultra-pure, 18 MOhm water you have handy in the lab: http://www.who.int/water_sanitation_health/dwq/nutdemineralized.pdf http://www.who.int/water_sanitation_health/dwq/nutdeminerali...