IQF LIF

Laser-induced fluorescence (LIF) is a non-invasive spectroscopic method in which the atoms or molecules of a sample are excited to a higher energy level by the absorption of laser photons followed by spontaneous emission of light. Spectroscopic analysis of the emitting light provides information of the molecular composition of the target material. LIF uses UV photons for material excitation in order to get spontaneous fluorescence emission informing on the molecular composition and structure of the sample. Via LIF it is also possible to assess the modifications induced by degradation or cleaning. The materials amenable of investigation by LIF can be organic (binding media, glues, wood, paper, textiles, varnishes) or inorganic (ceramic (clay/mud brick/terracotta/earthenware/stoneware/porcelain, glass, stone, metal and metallurgical by-products, pigments). The LIF equipment of this FIXLAB uses a Nd:YAG laser with pulses of nanosecond duration and fixed wavelengths in the UV region (213 and 266 nm).

Laser induced flourescence (lif)

Analysis method

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