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- W2065482051 abstract "The variation in mobile phase velocity as a function of the column radius has been shown to be a major limitation in the efficiency of HPLC columns. One contributing factor to the variability in the flow velocity stems from the heterogeneity in the radial packing density, leading to what has been described as the ‘wall-effect’. The wall-effect generates parabolic-type elution profiles, which dilutes the sample and creates tailing bands. In this communication a new column technology is discussed that has been designed to overcome the wall effect, minimising the limitations associated with packing heterogeneity. This technology has been referred to as active flow technology and consists of two types of column designs, parallel segmented flow and curtain flow. In both these column designs sample that elutes through the column in the radial central region of the bed is separated from the flow that elutes along the wall region. Hence, the sample that elutes through the most efficiently packed region of the bed is collected to the detector. As a consequence more theoretical plates are obtained, and sensitivity is increased since the sample is not diluted by the diffuse tail. Sensitivity is enhanced further in the curtain flow design. The benefits of these new columns are discussed" @default.
- W2065482051 created "2016-06-24" @default.
- W2065482051 creator A5012298023 @default.
- W2065482051 creator A5062836996 @default.
- W2065482051 date "2014-03-01" @default.
- W2065482051 modified "2023-09-25" @default.
- W2065482051 title "Segmented flow and curtain flow chromatography: Overcoming the wall effect and heterogeneous bed structures" @default.
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- W2065482051 doi "https://doi.org/10.1016/j.chroma.2013.08.004" @default.
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