Title: tailing
Long Title: IUPAC Gold Book - tailing
DOI: 10.1351/goldbook.T06249
Status: current

Definition
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.

Related Terms
- Asymmetry: https://goldbook.iupac.org//terms/view/A00486
- baseline: https://goldbook.iupac.org//terms/view/B00604
- chromatography: https://goldbook.iupac.org//terms/view/C01075
- peak: https://goldbook.iupac.org//terms/view/P04451
- thin-layer chromatography: https://goldbook.iupac.org//terms/view/T06346
- zone: https://goldbook.iupac.org//terms/view/Z06749

Sources
- Orange Book, 2nd ed., p. 96 (https://media.iupac.org/publications/analytical_compendium/)
- PAC, 1993, 65, 819. 'Nomenclature for chromatography (IUPAC Recommendations 1993)' on page 837 (https://doi.org/10.1351/pac199365040819)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/T06249/html
- json: https://goldbook.iupac.org/terms/view/T06249/json
- xml: https://goldbook.iupac.org/terms/view/T06249/xml

Citation: Citation: 'tailing' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.T06249
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Accessed: 2026-07-26T20:46:30+00:00