Abstract
The fluorescence spectrum of lead excited with a high-intensity hollow-cathode lamp has been investigated and the probable mechanism of fluorescence transitions is suggested. It is confirmed experimentally that the most intense fluorescence line at 405.78 nm is mostly due to direct-line fluorescence. The premixed air-hydrogen flame, the separated air-acetylene flame, and the oxy-hydrogen flame diluted with argon have been used, the last mentioned giving a detection limit of 0.02 ppm with the line at 405.78 nm.
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