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Continuum-source atomic absorption spectroscopy with an echelle spectrometer adapted to a charge injection device
C Hsiech1, S C Petrovic, H L Pardue
1Department of Chemistry, Purdue University, West Lafayette, Indiana 47907.
Analytical Chemistry
|September 15, 1990
Summary
A new instrumental system enables simultaneous multielement atomic absorption spectroscopy using an electrothermal atomizer and echelle spectrometer. This method achieves sensitive detection for elements like copper and chromium.
Area of Science:
- Analytical Chemistry
- Spectroscopy
Background:
- Atomic absorption spectroscopy (AAS) traditionally focuses on single-element analysis.
- Multiplex detection in AAS offers potential for increased efficiency and throughput.
Purpose of the Study:
- To develop and evaluate an instrumental system for simultaneous multielement determinations using continuum-source atomic absorption spectroscopy.
- To assess the performance of a novel system integrating an electrothermal atomizer and a charge injection device with an echelle spectrometer.
Main Methods:
- Development of a system combining an electrothermal atomizer and a charge injection device (CID) with an echelle spectrometer.
- Utilizing the CID's MOS capacitors for signal integration over a 40-nm spectral range.
- Implementation of novel methods for computing absorbances by scanning echelle spectra or random line selection.
Main Results:
- Simultaneous multielement detection was achieved with a 40-nm spectral range.
- Characteristic concentrations for Cu, Mn, and Cr were comparable to single-element detection methods.
- Sensitivity achieved was in the ng mL-1 range for the analyzed elements.
Conclusions:
- The developed instrumental system provides a viable approach for simultaneous multielement analysis in atomic absorption spectroscopy.
- The system demonstrates comparable sensitivity to traditional single-element techniques, offering enhanced efficiency.