net electric charge

in electrophoresis, of a particle
symbol: $z$
https://doi.org/10.1351/goldbook.N04111
The algebraic sum of the charges present at the surface of the particle divided by the elementary charge of the proton. The symbol \(z\) is also used for charge number of an ion.
Source:
PAC, 1994, 66, 891. (Quantities and units for electrophoresis in the clinical laboratory (IUPAC Recommendations 1994)) on page 895 [Terms] [Paper]