Minimization of non-spectroscopic matrix interferences for the determination of trace elements in fusion samples by flow injection inductively coupled plasma mass spectrometry

Abstract

The efficiency of various ion lens tuning strategies, flow injection and the use of an internal standard has been investigated for the determination of trace elements in real samples. Spike recoveries indicated that internal standardization was always preferable if 100% recovery was to be obtained. However, good recoveries were also obtained by tuning the ion lenses for a maximum ¹¹⁵In⁺ signal in a matrix blank solution containing 100 ng g^–1 of In, while using continuous nebulization sample introduction. Results indicated that tuning the ion lenses in the presence of the matrix yielded improved analyte recoveries when compared with tuning the lenses for a standard solution.