4 ms·
What's the current precision for measuring devices?
by tedunangst 2y ago
What's the current precision for measuring devices?
- sp332 2y agoHow much money do you have?
- tedunangst 2y agoWhat does it cost me to p .95 reliably differentiate 0.04 ppt from 0.02 ppt?
- jeffbee 2y agoIn water? Doesn't seem like an issue.
- Brananarchy 2y agoIn pure water it's not an issue. In drinking water which has all sorts of "stuff", getting very to that level of precision isn't easy.
- OutOfHere 2y agoIt's more meaningful to get a blood test which Quest Health offers without a prescription in the US, although it's not cheap. Obviously the blood test is very precise, but it tests only for a few types of PFAS, whereas thousands of types exist in the environment.
- sp332 2y agoI was browsing test kits where you send a sample back to a lab. They're $79 - $300 and advertise 1 or 2 parts per trillion. Looks like getting to 0.02 ppt requires some very specialized equipment, and would probably be optimized for continuous monitoring of a water supply.