This method is for determining metals in samples of unknown
composition such as residues and deposits. Aluminum (Al),
cadmium (Cd), calcium (Ca), chromium (Cr), cobalt (Co), copper
(Cu), iron (Fe), lead (Pb), magnesium (Mg), manganese (Mn),
molybdenum (Mo), nickel (Ni), potassium (K), sodium (Na),
strontium (Sr), tin (Sn), titanium (Ti), vanadium (V), zinc
(Zn), and zirconium (Zr) are quantitatively determined by
Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-
OES). Concentrations determined generally cover the range of
0.02 to several mass-%, see Table 1. Sample dilution extends the
working range for major (matrix) components. If requested,
additional elements can be determined, if the sample preparation
method is appropriate for the additional elements. Barium (Ba)
and silicon (Si) cannot be determined by this method due to the
acid treatment of samples. Alpha-alumina will not dissolve in
the acid media used in this method. An alternative microwave-
based dissolution technique is described in