Introduction to HPLC part 1

Introduction to HPLC

High Performance Liquid Chromatography (HPLC) is a process of separating components in a liquid mixture. A liquid sample is injected into a stream of solvent (mobile phase) flowing through a column packed with a separation medium (stationary phase). Sample components separate from one another by a process of differential migration as they flow through the column.

sample-bands-animation

As bands emerge from the column, flow carries them to one or more detectors which deliver a voltage response as a function of time. This is called a chromatogram. For each peak, the time at which it emerges identifies the sample constituent with respect to a standard. The peak’s area represents the quantity.

hplc-sample-bands-detection

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