Summary
Coincidence tables for ICP-AES are given for 20 Zr lines, 9 Nb lines and 7 Ta lines. They include 582 interferent lines of 49 elements. The specified interference data (IEC and CCR) hold for a bandwidth FWHM = 16 pm and an interferent concentration of 1,000 mg/l. For trace determinations of Zr, Nb, Ta in a matrix of Fe, W, Zr, Nb, Ta the dependence of the interference on the matrix concentration is specified up to 10,000 mg/l. Interference data CCR calculated for the ICP from the NBS tables often differ from the measured data by several orders of magnitude. The spectrum of Zr measured at a high concentration shows many weak lines most of which are not even listed in the MIT tables. They give rise to a quasi-continuous background the intensity of which increases nearly linearly with the matrix concentration. Therefore, an increase of sample concentration will not lead to an improved detection limit. The line intensities found in our investigations match well with those listed in the Wohlers tables.
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Wünsch, G., Wennemer, A. Spektrallinien und Koinzidenztafeln zur Bestimmung von Zirkonium, Niob und Tantal mit dem ICP. Z. Anal. Chem. 329, 546–570 (1987). https://doi.org/10.1007/BF00488204
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DOI: https://doi.org/10.1007/BF00488204