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A New T-shaped Graphite Furnace for Atomic Absorbtion Spectrometry
A new T-shaped graphite furnace for atomic absorption spectrometry (AAS) has been designed for kinetic analysis of trace elements. It is installed in heated graphite atomizer (GFA-EX7) connected with Shimadzu AAS system (AA6800). The furnace is installed in two different positions vertically and horizontally between the graphite electrodes. Good separations of analyte and matrix absorption signal were achieved for many elements with vertical position with some difficulties in sample injection procedure. Better results with horizontal position installation of the T-shaped furnace. The quality and performance of the new design was examined by creation of calibration curves for standard solutions of trace elements such as Ag, Cd, Bi, Mn, Cr, Al, and Cu. High temperature gas chromatography approach using T-shaped graphite furnace with short time temperature program and continuous flow is tested for separation of analyte and background signals. Analysis of highly interfering matrix such as urine is performed using this approach. Quantitative analyses of many elements in standard urine sample (seronormTM Trace Elements Urine LOT NO2525) and urine from Biorad were done. Standard addition curves for quantifications of high, middle and low volatile elements in that urine sample were obtained with very small background signals. More over standard bovine muscle and bovine liver were tested for application of high temperature chromatography in graphite and short time temperature program using T-shaped graphite furnace. All cases indicate the analyses of urine sample with high organic and inorganic matrix components and can be performed with less interferences and better accuracy. Excellent agreements between measured and certified values were achieved for analyzed elements in non diluted urine sample. The working range, characteristic mass and RSD are comparable with the corresponding analytical data using conventional AAS system. The new furnace design provides several advantageous features including: XIX (1) Very low ...
A New T-shaped Graphite Furnace for Atomic Absorbtion Spectrometry
A new T-shaped graphite furnace for atomic absorption spectrometry (AAS) has been designed for kinetic analysis of trace elements. It is installed in heated graphite atomizer (GFA-EX7) connected with Shimadzu AAS system (AA6800). The furnace is installed in two different positions vertically and horizontally between the graphite electrodes. Good separations of analyte and matrix absorption signal were achieved for many elements with vertical position with some difficulties in sample injection procedure. Better results with horizontal position installation of the T-shaped furnace. The quality and performance of the new design was examined by creation of calibration curves for standard solutions of trace elements such as Ag, Cd, Bi, Mn, Cr, Al, and Cu. High temperature gas chromatography approach using T-shaped graphite furnace with short time temperature program and continuous flow is tested for separation of analyte and background signals. Analysis of highly interfering matrix such as urine is performed using this approach. Quantitative analyses of many elements in standard urine sample (seronormTM Trace Elements Urine LOT NO2525) and urine from Biorad were done. Standard addition curves for quantifications of high, middle and low volatile elements in that urine sample were obtained with very small background signals. More over standard bovine muscle and bovine liver were tested for application of high temperature chromatography in graphite and short time temperature program using T-shaped graphite furnace. All cases indicate the analyses of urine sample with high organic and inorganic matrix components and can be performed with less interferences and better accuracy. Excellent agreements between measured and certified values were achieved for analyzed elements in non diluted urine sample. The working range, characteristic mass and RSD are comparable with the corresponding analytical data using conventional AAS system. The new furnace design provides several advantageous features including: XIX (1) Very low ...
A New T-shaped Graphite Furnace for Atomic Absorbtion Spectrometry
Asweisi, Abdelsalam (author) / Kuß, Heinz-Martin
2008-02-12
Theses
Electronic Resource
English
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