Längenabhängigkeit von hetp in der gaschromatographie

Halász, I.; Deininger, G.; Gerlach, H. O.

doi:10.1016/s0021-9673(01)82342-6

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1969

1976

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Cited by 9 publications

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“…In agreement with Halasz et al (2) we found a significant increase of HETP with column length that cannot be attributed to nonuniform column characteristics. We therefore doubt whether concepts such as HETP or number of theoretical plates per meter are correct figures to describe the effective quality of a given column.…”

Section: Discussionsupporting

confidence: 93%

Separation Efficiency Versus Column Length. An Experimental Study With Capillary Columns

Grob¹,

Grob

1969

Journal of Chromatographic Science

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The columns of different length used for studying the relation between HETP and column Iength are supposed to exhibit identical characteristics per meter. In the laboratory this condition cannot be rigorously fulfilled. The best approximation probably consists in starting the work with a relatively long capillary column followed by running shorter parts obtained by progressive cutting of the original column. Based on this procedure a marked increase of HETP with increasing column Iength is observed.

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Section: Discussionsupporting

confidence: 93%