Graphite Furnace Modification for Second Surface Atomization
作者： James A. Holcombe , Michael T. Sheehan
关键词: Spark plug 、 Pyrolytic carbon 、 Graphite 、 Condensation 、 Isothermal process 、 Analyte 、 Analytical chemistry 、 Thermal decomposition 、 Matrix (chemical analysis) 、 Materials science
摘要: Preliminary results from a simple furnace modification are presented. A graphite condensation site has been located inside commercial atomizer. Solution samples deposited on the wall and analyte other condensible species "distilled" to this during high temperature ash. During atomization cycle, is revaporized "plug" into higher environment. The plug radiatively heated can lag behind by more than 1000 K, thus providing environment which nearly isothermal. heating program with transfer permits extremely ash temperatures be used offers possibility of separating gaseous, thermal decomposition products matrix. Additionally, distortions analytical absorbance signal caused degradation in pyrolytic surface minimized when secondary employed. Limits detection for Ag, Cr, Cu, Fe, Pb, Sn, Zn within factor 2 values determined using atomization. Studies presented interference sulfate Sn analysis. Improved peak height sensitivity decreased dependency concentrations have observed.
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