Ramp

Continually changing the composition of the delivered solvent mixture over the desired time (for %-Gradients) or the flow (for Flow Gradients) is referred to as a ramp (or more precisely as a ramp gradient). Contrary to this, immediate changes of the solvent composition or flow are referred to as Step Gradient.

To realize a ramp gradient, define one value for the beginning and another value for the end. Between these two values, Chromeleon automatically calculates the solvent composition (or flow) at the respective time (two ramps in the example below: 0 - 2 min and 3 - 5 min):