Fluorescence line narrowing spectrometry FLNS

The structure of the adduct was established by fluorescence line narrowing spectrometry (FLNS). Recovery and precision data were not reported (Rogan et al. 1990). 

Ambient temperature luminescence spectrometry has been applied to the characterisation of complex PAH-mixtures with only limited success because of excessive overlap of excitation or emission spectra. However, considerable sharpening of PAH absorption bands is observed, when these molecules are incorporated into appropriate matrices and solidified at low temperatures. Generally, three different techniques to achieve fluorescence line narrowing have been attempted, which only differ by the nature and the preparation of the host matrix. Methods to perform fluorescence line narrowing spectrometry (FLNS) are based on the Shpol skii effect, matrix isolation or the use of organic glasses. 

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