<P> A theoretical plate in many separation processes is a hypothetical zone or stage in which two phases, such as the liquid and vapor phases of a substance, establish an equilibrium with each other . Such equilibrium stages may also be referred to as an equilibrium stage, ideal stage, or a theoretical tray . The performance of many separation processes depends on having series of equilibrium stages and is enhanced by providing more such stages . In other words, having more theoretical plates increases the efficiency of the separation process be it either a distillation, absorption, chromatographic, adsorption or similar process . </P> <P> The concept of theoretical plates and trays or equilibrium stages is used in the design of many different types of separation . </P>

What is a theoretical plate (hetp) in chromatography
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