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Signal summation for the improvement of the detection performance and indirect increase of the sample quantity in direct AAS of solids

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Summary

Time-resolved AAS signals of several, individually-weighed, solid samples were stored and later summed by the personal computer. This summation yields a signal covering all the individual samples, with a signal-to-noise ratio which is improved according to the \(\sqrt N\) law familiar from other replicate determination techniques. This makes it possible to determine concentrations in samples at levels where it would otherwise be necessary to resort, for instance, to a preliminary chemical concentration step. The technique has been applied to the determination of traces of Pb and Cd in malt and yeast.

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Authors and Affiliations

  1. Chemisches und Lebensmitteluntersuchungsamt Dortmund, Hövelstrasse 8, D-4600, Dortmund 1, Federal Republic of Germany

    W. Hennig

  2. Institut für Spektrochemie und angewandte Spektroskopie, Postfach 101 352, D-4600, Dortmund 1, Federal Republic of Germany

    H. Berndt & G. Schaldach

Authors
  1. W. Hennig
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  2. H. Berndt
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  3. G. Schaldach
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Hennig, W., Berndt, H. & Schaldach, G. Signal summation for the improvement of the detection performance and indirect increase of the sample quantity in direct AAS of solids. Fresenius J Anal Chem 337, 275–279 (1990). https://doi.org/10.1007/BF00321973

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  • DOI: https://doi.org/10.1007/BF00321973

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