rotational frequency, \(f_{\text{rot}}\)

in centrifugation
The number of rotations divided by time: \[f_{\text{rot}}=\frac{\text{d}N}{\text{d}t}\] The synonyms rate of rotation, rate of revolution, centrifugal speed, centrifugation speed, and the traditional units of rotational frequency such as revolutions per minute, r.p.m., ppm, \(\text{rev min}^{-1}\), \(\text{r min}^{-1}\), are not recommended.
PAC, 1994, 66, 897. (Quantities and units for centrifugation in the clinical laboratory (IUPAC Recommendations 1994)) on page 904 [Terms] [Paper]
PAC, 1996, 68, 957. (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)) on page 991 [Terms] [Paper]