DETERMINATION OF INORGANIC SPECIES BY THERMAL LENS SPECTROMETRY

The application of thermal lens spectrometry (TLS) to the determinatio n of inorganic species is reviewed. The requirements of a chromogenic reaction to be advantageously adapted to TLS detection, and the necess ary conditions for reaching very low limits of detection are discussed . Methods for the determination of metals and P, Si, S and N compounds in several samples are examined. Flow-injection and extraction method s, associated photoinduced reactions and surface phenomena, speciation and equilibrium studies are discussed. Gas phase NO2 methods are also commented upon. Trends are given.