Abstract
Analysis of fatty acid still bottom residues for major, minor, and trace element content using inductively coupled plasma-atomic emission spectroscopy is described. A combination of isopropyl alcohol and nitric acid (IPA-HNO 3) provided the best solvent for the samples. Wavelength selection, ICP operating conditions, detection limits, background equivalent concentrations, and analytical figures of merit were established for the quantitative determination of Zn, Cd, Cu, and Ni. For the determination of trace levels of As, Se, and Hg, direct ICP analysis was found to be too insensitive. Hydride generation for As and Se, and elemental generation of Hg in the plasma were attempted. These elements were not detected in any of the samples.
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