Title: pre-filter effect
Long Title: IUPAC Gold Book - pre-filter effect
DOI: 10.1351/goldbook.P04813
Status: current

Definition
This effect arises when the luminescence detector does not see a portion of the luminescent volume where the excitation beam enters the sample. Thus the exciting beam flux is reduced by absorption by the analyte and interfering impurities before it enters the volume observed by the detection system.

Related Term
- luminescence: https://goldbook.iupac.org/terms/view/L03641

Source
- PAC, 1984, 56, 231. 'Nomenclature, symbols, units and their usage in spectrochemical analysis-Part VI: molecular luminescence spectroscopy' on page 244 (https://doi.org/10.1351/pac198456020231)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/P04813/html
- json: https://goldbook.iupac.org/terms/view/P04813/json
- xml: https://goldbook.iupac.org/terms/view/P04813/xml

Citation: Citation: 'pre-filter effect' 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.P04813
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Accessed: 2026-06-28T13:51:12+00:00