http://www.scientistsolutions.com/t14150-ppm%2c+ppb.html Life Science Discussion en-us sci7feed@sci7.nojunkorherepleasespam.com hourly 1 2005-05-05T12:00+00:00 http://www.scientistsolutions.com/t14150-ppm%2c+ppb.html Mik]]> Wed, 24 Mar 2010 09:43:10 GMT http://www.scientistsolutions.com/t14150-ppm%2c+ppb.html You are correct that ug/g is "ppm." mg/g is "parts-per-thousand" as Greg mentioned.
To avoid confusion, I would report results using ppm (ug/g) or ug/g (ppm) in the heading, so that there is no confusion.
]]> Wed, 24 Mar 2010 09:23:36 GMT http://www.scientistsolutions.com/t14150-ppm%2c+ppb.html Wed, 24 Mar 2010 08:19:01 GMT http://www.scientistsolutions.com/t14150-ppm%2c+ppb.html Depending on a specific application calls for certain units.
If you use a lot of NIST SRM's you run into ug/g for example. I use all forms of units at my job including ug/m3, ug/mL etc...
One needs to be aware of the stoichiometry that presents itself and how to calculate the right concentration units neede for the right application.
Mik]]> Tue, 23 Mar 2010 20:11:14 GMT http://www.scientistsolutions.com/t14150-ppm%2c+ppb.html Having said that, if we had to stay with "PPM" and "PPB";
Take a look at "Wikipedia"; http://en.wikipedia.org/wiki/Parts-per_notation.
mg/g would be 1 in 1,000 or 1 X 10-3 which would be parts per thousand (mg/g).
ug/g would be 1 in ...]]> Tue, 23 Mar 2010 16:53:42 GMT http://www.scientistsolutions.com/t14150-ppm%2c+ppb.html you would be in ug/g which is ppb. You need to be in mg/g for ppm. Multiply your final result by 1000.]]> Tue, 23 Mar 2010 16:21:52 GMT http://www.scientistsolutions.com/t14150-ppm%2c+ppb.html Thanks]]> Mon, 15 Mar 2010 16:24:04 GMT