Construction and performance of a time-multiplex multiple-slit flame atomic fluorescence spectrometer for multi-element analysis |
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Authors: | Eric D Salin JD Ingle |
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Institution: | Department of Chemistry, Oregon State University, Corvallis, Oregon 97331 U.S.A. |
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Abstract: | The design and performance characteristics of a new multi-element flame atomic fluorescence spectrometer are presented. Radiation from four hollow-cathode tubes is directed onto an unsheathed air—hydrogen flame. The resulting atomic fluorescence is viewed by a special monochromator with a separate exit slit for each element. The light exiting from all slits is directed to a single photomultiplier tube. The fluorescence signals from different elements are distinguished by a time multiplex approach. Single-element detection limits for ten elements and multi-element detection limits for four elements are presented. The degradation of detection limits by flame background emission noise and effect of flame composition on performance are discussed. Better than 1% precision is obtained for moderate analyte concentrations. |
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