Fluorescence is the spontaneous emission of light shortly after the excitation of a material by an electron transition. The fluorescence photons are usually lower in energy than the excitation photons (= Stokes shift). The fluorescence typically has a lifetime (or duration) of nanoseconds (10−9 s) per transition. A fluorescence spectrophotometer normally has an excitation monochromator that defines the excitation energy, and an emission monochromator that provides a full spectrum of the fluorescence emission. Note that fluorescence is the most common interference in Raman spectra and that fluorescence is a strong background interferent of Raman scattering. Often the much stronger fluorescence masks the weaker Raman signal. This is often true for resonance Raman and also for heterogenous biological or mineralogical samples. Also traces of impurities can lead to fluorescence masking the Raman signal.

The term "fluorescence" was found in the following pages:

Directory of scientists: Nelson Belzile
Journals database: Spectrochimica Acta, Part A: Molecular Spectroscopy
Instrument database: Aurora Biomed - LUMINA 3300 Atomic Fluorescence Spectrometer
Instrument database: Hewlett-Packard - HP 1050 series HPLC
Books and Special Issues on Elemental Speciation (published since 2011) | EVISA's News
Instrument database: Thermo Scientific - UltiMate™ 3000 BioRS System
Instrument database: Bruker AXS GmbH - S4 PIONEER - XRF Spectrometer
All about Molecular Spectroscopy - Resources related to Molecular Spectroscopy | EVISA's News
Instrument database: Shimadzu Europe - EDX-720/800HS/900HS
Instrument database: Thermo Scientific - Finnigan SpectraSystem LC
Instrument database: Agilent Technologies Inc. - 1100 Series Fluorescence Detector
Chemical vapor generation as a sample introduction technique for speciation analysis | EVISA's News
Instrument database: Bruker Nano GmbH - M1 MISTRAL: Compact Tabletop µ-XRF Spectrometer
Company database: PG Instruments Ltd
U.S. sales of widely used drug "Roxarsone" for chickens to be suspended | EVISA's News
Chemical speciation analysis for nutrition and food science | EVISA's News
Isotope dilution analysis using ICP-MS detection for trace element speciation | EVISA's News
Nanoparticles - a target for speciation analysis | EVISA's News
Instrument database: ESA Inc. - Model 530 High Sensitivity Fluorescence Detector
New way of cooking rice removes arsenic and retains mineral nutrients, study shows | EVISA's News