Summary |  SN- ICP-MS  |  LA-ICP-MS | DV-ICP-MS | HG-ICP-MS| DCP

DCP-OES

Major ( Si, Al, Ca, Mg, Fe, Na, K, Ti, and Mn) and minor (Zn, Co, Cu, Sr, Ni, V, Ba, Cr, Sc, and Ge) elements are measured by direct couple plasma (DCP) optical emission spectrometry (OES). A mixture of 100 mg of samples and 400 mg of LiBO2 flux is fused at 1100 ºC for 20 minutes in a graphite crucible. The molten bead was dissolved in 5% nitric acid, and diluted to 1:5000 for major elements and 1:250 for minor elements. Germanium, Co, and Li are used as internal standards.