tailing 

in chromatography
https://doi.org/10.1351/goldbook.T06249
Asymmetry of a peak such that, relative to the baseline, the front is steeper than the rear. In paper chromatography and in thin-layer chromatography, the distortion of a zone showing a diffuse region behind the zone in the direction of travel.
Sources:
Orange Book, 2nd ed., p. 96 [Terms] [Book]
PAC, 1993, 65, 819. (Nomenclature for chromatography (IUPAC Recommendations 1993)) on page 837 [Terms] [Paper]
Citation: 'tailing' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.T06249 RIS BibTex EndNote
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Last revised: February 24, 2014