Apparatus and method for supply of sample and sheath liquids to analytical flow cell.

摘要

An apparatus and method, especially useful in automated analytical systems, for concomitant pumping, to a sheath stream flow cell (12), a first fluid (e.g. sample) from a selected one of a plurality of different sources (40, 42, 44) and a second fluid (e.g. sheath) from a selected one of a plurality of different sources (96, 98, 100), including control means (22, 152) to select appropriate first and second fluids from said different sources. Differential pumping is preferably employed.