Browsing by Author "Matulis, CE"

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    Analysis of soil extract solutions by direct reading emission spectrometry
    (Australian Atomic Energy Commission, 1976-04) Dale, LS; Matulis, CE
    A rapid spectrometric method was developed for the determination of trace and major elements in aqueous soil extract samples. The rotating disc technique with high voltage excitation was used in conjunction with a direct reading spectrometer. The procedure determines simultaneously zinc, cobalt, lead, copper, nickel, manganese and vanadium at concentrations of between 1 and 1000 mg £-1 together with calcium, magnesium, aluminium and iron at levels usually in excess of 1000 mg £-1. Lutetium is used as an internal standard. The coefficients of variation for all elements range between 2 and 15 per cent.
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    Use of a total intensity internal standard for the emission spectrographic analysis of multicomponent alloy systems
    (Australian Atomic Energy Commission, 1977-05) Dale, LS; Matulis, CE
    A summation of the normalised relative intensities of selected spectrum lines of the major components of an alloy is used as an internal standard for the emission spectrographic analysis of a group of alloys. The procedure depends on the sum of the concentrations of the major components being constant but does not rely on prior knowledge of these concentrations. The usefulness of the technique is demonstrated in the analysis of stainless steels, using argon spark excitation with point-to-plane geometry. In principle, the technique should be applicable to other alloy systems.