1. Biology Dictionary
  2. Partspermillion (ppm)

Partspermillion (ppm)百万分率(ppm)

释义:

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.

百万分率(ppm),一种浓度单位,是用溶质质量占全部溶液质量的百万分比来表示的浓度,也称百万分比浓度。

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