mass flow rate, \(q_{\text{m}}\)

https://doi.org/10.1351/goldbook.M03720
Mass of a material crossing a surface divided by the time.
Source:
PAC, 1996, 68, 957. 'Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)' on page 980 (https://doi.org/10.1351/pac199668040957)