NDLI: Automatic sample handling and calibration methods for analysis by flame atomic absorption spectrometry using discontinuous flow analysis

Content Provider	Royal Society of Chemistry (RSC)
Author	Selby, Mark Smith, Fraser O. Turak, Elvan E. Krieger, Brian L. Petty, John D. Peachey, Russell M. Kimber, Graham M.
Copyright Year	1994
Abstract	The method of discontinuous flow analysis (DFA) is presented as a rapid, automated method of sample handling and analysis in flame atomic absorption spectrometry (FAAS). Three DFA arrangements for combined DFA-FAAS are described. The first provides automatic calibration in approximately 30 s using a single solution, the second provides rapid automated standard additions and the third provides an automated version of the sample bracketing procedure. The last two methods allow for concurrent calibration and determination of samples in a single operation lasting around 30 s. This continual re-calibration minimizes the effects of instrument drift and ensures accurate and precise measurement. The DFA-FAAS combination provides a great deal of information that could be used to advantage, for quality assurance purposes. However, this extra information gathering does not require additional labour on the part of the operator because only one or two standard solutions need to be employed to construct complete analytical calibration curves. In contrast to other automated methods of sample handling, the DFA technique uses high-precision cam-driven piston pumps and a valve arrangement to manipulate flowing streams containing reagents, diluents, standards and samples in a controlled and rapid fashion.
Starting Page	267
Ending Page	272
Page Count	6
File Format	PDF
ISSN	02679477
Volume Number	9
Issue Number	3
Journal	Journal of Analytical Atomic Spectrometry
DOI	10.1039/JA9940900267
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	DFA Deterministic finite automaton Absorption spectroscopy Piston
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Analytical Chemistry

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