fluorescence spectroscopy.

Fluorescence spectroscopy is a type of photoluminescence. It is a rapid, sensitive analytical method for characterizing molecular environments. The great advantage of fluorescence spectroscopy over other techniques such as absorption spectroscopy is that fluorescence is a background-free technique, so tiny concentrations of analyte can be detected. Examples of the use of fluorescence spectroscopy include the study of fluorescent dyes that are widely used with biological samples.