Analysis Of Graphite Ashes, Chromium And Iron Oxides By A Simultaneous Inductively Coupled Plasma Atomic Emission Spectrometer

The introduction of solid state detectors (CCD, CID) in ICP-AES spectrometers of new generation allows a vast number of spectral lines to be monitored simultaneously for any individual element. The study of the intensities ratio of the lines MgII/MgI allowed so-called "robust conditions" to be identified, i.e. those conditions where a change in the matrix or reagent concentration does not produce any significant change in the analyte signal. The conditions correspond to a rf power of 1350W and a gas flow rate of 0.51/min. The addition of 10ppm Yttrium as internal standard produced a marked improvement of the line stability.