Issue 5, 1990

On-line pre-concentration of refractory elements for atomiser, source, inductively coupled plasmas in atomic fluorescence spectrometry (ASIA)

Abstract

A simple flow manifold coupled to an atomiser, source, inductively coupled plasmas in atomic fluorescence spectrometry (ASIA) system for the pre-concentration of refractory elements is described. A miniature column of Amberlite IRA-93 anion-exchange resin was used to pre-concentrate refractory elements such as tungsten, molybdenum, zirconium and vanadium as their oxyanions from synthetic aqueous solutions before detection. A study of the parameters that affect the performance of the method is described. The pre-concentrated species were eluted with a stream of ethanolic ammonia directly into the nebuliser of the atomiser plasma. The limits of detection based on a sample volume of 35 ml (sampling time 5 min at 7 ml min–1) were 65 and 15 ng ml–1 for tungsten and molybdenum, respectively. Relative standard deviations of 4.28 and 5.24% were obtained for 0.5 and 0.1 µg ml–1 concentrations of tungsten and molybdenum, respectively. Further improvements in detection limits were obtained after modification to the instrument; although the main objective of this work was to develop a pre-concentration method applicable to the simultaneous determination of a number of refractory elements, this was not achieved. However, the proposed method could be used for pre-concentration of tungsten and molybdenum.

Article information

Article type
Paper

Analyst, 1990,115, 531-534

On-line pre-concentration of refractory elements for atomiser, source, inductively coupled plasmas in atomic fluorescence spectrometry (ASIA)

S. Greenfield, T. M. Durrani, S. Kaya and J. F. Tyson, Analyst, 1990, 115, 531 DOI: 10.1039/AN9901500531

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