Partspermillion (ppm)

Definition:

Partspermillion (ppm), a concentration unit, is the concentration expressed by the solute mass in parts per million of the total solution mass, also known as the concentration in parts per million.

References:

[1]. Stefano Gianni, et al. Ideation and assessment of a nitric oxide delivery system for spontaneously breathing subjects. Nitric Oxide. 2020 Nov 1;104-105:29-35. [Content Brief]

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