Flexibility regarding excitation and wavelengths as well as sample preparation
Relative low cost of instrumentation & outstanding selectivity and sensitivity
Identification of biomolecules using multiple parameters
Direct detection of ions and determination of pH-values
Steady-State Spectroscopy Most of the applications are based on constant excitation Conventional Fluorometry - Measurements of emission light intensities at defined wavelengths suggested as excitation certain emission maxima of a fluorophore. Total Fluorometry - Collection of data for a continuum of absorption as well as emission wavelengths. Fluorescence Polarization - Polarized light used for excitation. Binding of fluorochrome-labeled antigens to specific antibodies affects polarization extent. Line Narrowing Spectroscopy - Low-temperature spectroscopy that derives its selectivity from narrow-line emission spectra.
Time-Dependent Fluorescence Spectroscopy Time-resolved measurements contain more information than steady-state measurements, since the steady-state values represent the time average of time-resolved determinations Single Photon Timing Technique - The time between an excitation light pulse and the first photon emitted by the sample is measured.
Frequency-Domain Fluorescence Spectroscopy The time decay of fluorescence is typically measured using a light source with an intensity modulated sinusoidally at a given frequency, by determining the phase delay and the relative modulation of the fluorescence signal with respect to the exciting light
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