It is also equivalent to one part per billion (ppb). One ppb is 1,000 times a part per million. Concentrations measured in ppm and ppb are so small that they can be difficult to conceptualize.

Girl Scouts” is a name synonymous with character-building and, of course, cookies. Now “Girl Scout cookies” appears to have a new affiliation: lawsuit. Forbes reports how a class action lawsuit filed ...

The M500 TOC analyzer enables simultaneous measurements of conductivity and has an operating range of 0.03 ppb to 2.5 ppm with excellent accuracy. The new model increases analysis speed by as much as ...