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- W2051139911 abstract "(Routine determination of element traces in niobium and tantalum.) The limitations of the determination of 14 trace elements (Ag, Ba, Ca, Cd, Co, Cr, Cu, Fe, Mg, Mn, Ni, Sr, Tl and Zn) in niobium and tantalum by inductively coupled plasma atomic emission spectrometry (ICP-AES) are pointed out. Nb and Ta can be removed by a wet chemical tarce-matric separation procedure using cation exchange from hydrofluoric acid solution. The traces can be isolated from a large amount of sample and collected in a small volume of liquid. Detection limits using ICP-AES are thereby lowered by about a factor of ten. The matrix-free solutions are suitable for measurement by ICP-MS. Die Grenzen der Bestimmung von Spuren in hochreinen Niob und Tantal durch ICP-AES werden für 14 Elemente (Ag, Ba, Ca, Cd, Co, Cr, Cu, Fe, Mg, Mn, Ni, Sr, Tl und Zn) gezeigt. Eine nasschemische Spuren-Matrix-Trennung mit einem Kationen-Austauscher aus flussaurer Lösung entfernt Niob und Tantal und sammelt die Spuren in einem kleinen Volumen Lösung. Sie können dadurch aus einer grs̈seren Menge Metallprobe isoliert werden. Es ergibt sich eine Senkung der Nachweisgrenze bei Bestimmung mit ICP-AES um etwa den Faktor zehn. Die von der Matrix befreiten Lösungen eignen sich zur Analyze mit ICP-MS." @default.
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- W2051139911 date "1992-03-01" @default.
- W2051139911 modified "2023-09-27" @default.
- W2051139911 title "Möglichkeiten zur routinemäßigen Bestimmung von Elementspuren in Niob und Tantal" @default.
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- W2051139911 doi "https://doi.org/10.1016/0003-2670(92)85109-j" @default.
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