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A system for the measurement of laser induced atomic fluorescence in a graphite furnace has been optimised for the determination of thallium. Careful attention has been given to optical considerations, particularly with regard to rejection of spurious background due to fluorescence from surfaces in the optical path. A ray-tracing calculation was used to identify means for enhancing the light collection efficiency of the system, while rejecting photons not resulting from analyte fluorescence. A limit of detection of 0.1 fg was obtained.

Additional information

Authors: SMITH B W, University of Florida, Department of Chemistry, Gainesville, Florida (US);FARNSWORTH P B, Brigham Young University, Provo, Utah (US);CAVALLI P, JRC Ispra (IT);OMENETTO N, JRC Ispra (IT)
Bibliographic Reference: Article: Spectrochimica Acta, Vol. 45B (1990) No. 12, pp. 1369-1373
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