sample introduction

in isotachophoresis separations

mentioned: leading electrolyte, terminating electrolyte

https://doi.org/10.1351/goldbook.09930

In isotachophoresis a sample is introduced between a zone of fast leading electrolyte and a zone of slow terminating electrolyte.

Note: Usually, the leading and terminating electrolytes have a common counter-ion, but the co-ions are different.

Source:
PAC, 2017, 90, 181. 'Terminology of separation methods (IUPAC Recommendations 2017)' on page 219 (https://doi.org/10.1515/pac-2017-0111)