Terme de Glossaire
Parts-per notation
In science and engineering, the parts-per notation is a set of pseudo units to describe small values of miscellaneous dimensionless quantities, e.g. mole fraction or mass fraction. Commonly used are ppm (parts-per-million, 10–6), ppb (parts-per-billion, 10–9), ppt (parts-per-trillion, 10–12) and ppq (parts-per-quadrillion, 10-15).
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
UcP7CU9ae40gfMdE