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  2. Van Deemter equation - Wikipedia

    en.wikipedia.org/wiki/Van_Deemter_equation

    The van Deemter equation is a hyperbolic function that predicts that there is an optimum velocity at which there will be the minimum variance per unit column length and, thence, a maximum efficiency. The van Deemter equation was the result of the first application of rate theory to the chromatography elution process.

  3. Size-exclusion chromatography - Wikipedia

    en.wikipedia.org/wiki/Size-exclusion_chromatography

    The main application of size-exclusion chromatography is the fractionation of proteins and other water-soluble polymers, while gel permeation chromatography is used to analyze the molecular weight distribution of organic-soluble polymers.

  4. Column chromatography - Wikipedia

    en.wikipedia.org/wiki/Column_chromatography

    A faster flow rate of the eluent minimizes the time required to run a column and thereby minimizes diffusion, resulting in a better separation. However, the maximum flow rate is limited because a finite time is required for the analyte to equilibrate between the stationary phase and mobile phase, see Van Deemter's equation.

  5. Theoretical plate - Wikipedia

    en.wikipedia.org/wiki/Theoretical_plate

    The same equation applies in chromatography processes as for the packed bed processes, namely: = In packed column chromatography, the HETP may also be calculated with the Van Deemter equation. In capillary column chromatography HETP is given by the Golay equation.

  6. High-performance liquid chromatography - Wikipedia

    en.wikipedia.org/wiki/High-performance_liquid...

    The quantitative parameters and equations which determine the extent of performance of the chromatographic system. The parameters are largely derived from two sets of chromatographic theory: plate theory (as part of partition chromatography), and the rate theory of chromatography / Van Deemter equation. Of course, they can be put in practice ...

  7. Jan van Deemter - Wikipedia

    en.wikipedia.org/wiki/Jan_van_Deemter

    Jan Jozef van Deemter (31 March 1918 – 10 October 2004) was a Dutch physicist and engineer known for the Van Deemter equation in chromatography. [ 1 ] [ 2 ] [ 3 ] He obtained his doctorate in physics from the University of Amsterdam in June of 1950.

  8. Alírio Rodrigues - Wikipedia

    en.wikipedia.org/wiki/Alírio_Rodrigues

    The Rodrigues equation is an extension of the Van Deemter equation used to describe the efficiency of a bed of permeable (large-pore) particles. [4] The equation is: = + + where HETP is the height equivalent theoretical plate

  9. Two-dimensional chromatography - Wikipedia

    en.wikipedia.org/wiki/Two-dimensional_chromatography

    Two-dimensional chromatograph GCxGC-TOFMS at Chemical Faculty of GUT GdaƄsk, Poland, 2016. Two-dimensional chromatography is a type of chromatographic technique in which the injected sample is separated by passing through two different separation stages.