Isodispersion curves in flow injection analysis

This paper describes experimental equations that relate the dispersion coef ficient to the geometry and hydrodynamic parameters of a flow injection sys tem. Data are presented as isodispersion curves (similar to isothermal, iso bar or isochore representations). The results present a correlated overview , which makes theoretical evaluation of the dispersion coefficient simple. Geometric and operational parameters for a flow injection system can be est ablished when the dispersion is to be maintained within certain limits. The parameters addressed in this study are: tube length (100-1200 mm); tube di ameter (0.3-0.8 mm); injected volume (93 mu l); and volumetric flow rate (0 .75-2.0 ml min(-1)).