Question

part per million formaula with examples

Answer 1

Parts Per Million (ppm) is a measurement of the concentration of a soluton.

For very dilute solutions, weight/weight (w/w) and weight/volume (w/v) concentrations are sometimes expressed in parts per million.

parts per million is abbreviated as ppm

1 ppm is one part by weight, or volume, of solute in 1 million parts by weight, or volume, of solution.

In weight/volume (w/v) terms,

1 ppm = 1g m-3 = 1 mg L-1 = 1 μg mL-1

In weight/weight (w/w) terms,

1 ppm = 1 mg kg-1 = 1 μg g-1

For example, let's say you had 25 pieces defective in a shipment of 1,000 pieces. 25/1000= .025 or 2.5% defective. . 025 X 1,000,000 = 25,000 PPM.