Improvements in thermospray flame furnace atomic absorption spectrometry |
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Authors: | Joanne Davies |
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Affiliation: | Institut für Spektrochemie und angewandte Spektroskopie (ISAS), Bunsen-Kirchhoff Street 11, 4413 Dortmund, Germany |
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Abstract: | In thermospray flame furnace atomic absorption spectrometry (TS-FF-AAS) a nickel atomization tube is placed in the acetylene/air flame on a holder built onto a standard AAS burner head. The liquid to be analyzed is transported by a low or high-pressure pump through a very hot, simple, inexpensive ceramic capillary tip acting as a flame-heated thermospray into the flame furnace. This results in complete sample introduction and increases the residence time of the sample in the absorption volume. This leads for 17 elements to a 3-110-fold improvement in the power of detection compared to conventional flame AAS. The absolute detection limits (3s values, N=25) lie between 0.2 μg l−1 (Zn) and 310 μg l−1 (Se) according to the element. The R.S.D. (N=15) is 1.4-5.5% according to the element and applied concentration. TS-FF-AAS can easily be incorporated on any standard flame AAS instrument and can be automated with a standard autosampler. |
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Keywords: | Thermospray nebulization Thermospray flame furnace atomic absorption spectrometry |
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