Book/Report

FZJ-2018-01572

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Spektralanalytische Untersuchungen in induktiv gekoppelten N$_{2}$/AR und AR/AR Hochfrequenz-Plasmen

Malinowski, P. (Corresponding author)FZJ* ; Mazurkiewicz, M.FZJ* ; Nickel, H.FZJ*

1981
Kernforschungsanlage Jülich, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/17542

Report No.: Juel-1709

Abstract: In order to improve the detection limits of trace elements in corrosion products of metallic materials, the inductively coupled plasma excitation source (ICP) was applied for spectroscopic analysis. Besides optimizing the working conditions for the mentioned materials, the fundamental research clearing the excitation processes in ICP was carried out. Basicly, two plasma systems were investigated: the nitrogen cooled N$_{2}$/Ar- and pure Ar/Ar-plasma. The computed detection limits for 8 chosen elements are between 0,1 and 50 $\mu$g ml$^{-1}$ in both plasmas. The adventage of ion lines was clearly present; in N$_{2}$/Ar-plasma it was larger than in Ar/Ar-plasma. The excitation temperatures measured with help of ArI, FeI and ZnI lines rise with increasing power and decreasing distance from the induction coil. The distribution of Zn excitation temperature in N$_{2}$/Ar-plasma as well as the measured N$_{2}^{+}$ rotational and CN vibrational temperatures indicate, that the toroidal structure of Ar/Ar-plasma is not analogue to the N$_{2}$/Ar-plasma. The values of the various excitation temperatures (Ar, Fe, Zn) and the differences between the excitation, vibration, rotation and ionization temperatures (T$_{i}$ > T$_{n}$ = T$_{vib}$ > T$_{rot}$) indicate an absence of thermal equilibrium in the concerned system. The calculated populations of the metastable Ar levels imply an influence of those levels on the excitation process (Penningionization). The matrix elements (Cr, Ni, Fe and Na) up to the concentration of 1ooo $\mu$g ml$^{-1}$ have a small influence on the relative line intensity deviation of Al, Ti and V (less than $\pm$ 19 %). The completed analyses of high temperature alloys match closely the producer's value.

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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Database coverage:

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