Improved cesium sensitivity in electrothermal atomic absorption spectrometry |
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Authors: | James F. Chapman Leslie S. Dale Sharon A. Topham |
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Affiliation: | CSIRO Division of Energy Chemistry, Lucas Heights Research Laboratories, New Illawarra Road, Lucas Heights, NSW 2234 Australia;AAEC Materials Division, Lucas Heights Research Laboratories, New Illawarra Road, Lucas Heights, NSW 2234 Australia |
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Abstract: | The sensitivity for cesium determination by electrothermal atomic absorption spectrometry is improved four-fold by the addition of a large excess of potassium nitrate. Zeeman background corrections is used to compensate for the large non-specific absorption signal resulting from the potassium. The characteristic concentration and detection limit are 0.44 and 2 μg l?1, respectively, and the coefficient of variation is 2% at the 50 μg l?1 level. The procedure is suitable for the rapid determination of cesium in leach solutions from nuclear waste fixation experiments. |
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