Continuum source atomic fluorescence of elements with resonance lines in the far ultraviolet

Statistics – Applications

Scientific paper

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Far Ultraviolet Radiation, Fluorescence, Line Spectra, Radiation Sources, Ultraviolet Spectra, Iodine, Mercury (Metal), Metal Hydrides, Signal To Noise Ratios, Sulfur, Volatility

Scientific paper

The feasibility of using continuum source atomic fluorescence as a trace analytical technique for the determination of elements which are excited by radiation below 250 nanometers was studied using as the primary radiation source the EIMAC 300 watt high pressure short arc xenon illuminator. By a combination of a low background atomization system (argon-hydrogen-entrained air flame) with volatile compound formation for sampling, the signal-to-noise ratio was improved by several orders of magnitude. Hydride generation combined with continuum source atomic fluorescence was optimized. Analytical figures of merit were obtained for arsenic, antimony, bismuth, germanium, selenium, and tellurium. Other volatile compounds analyzed by atomic fluorescence included hydrogen sulfide, sulfur dioxide, elemental mercury, and elemental iodine. The atomic fluorescence of sulfur and iodine are the first reported applications to these elements. Molecular fluorescence of I2 was also investigated.

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