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 gā1 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.