Thanks to its peculiar properties like corrosion, chemical resistance, electrical conductivity and ductility, gold is widely used in electronics industry as material for electrical connections in mass manufactured electronic devices such as circuit boards, integrated chips and semiconductors but also in a variety of novel microelectronic devices like sensors. The well-known biocompatibility of gold has led to its medical use since ancient times. Also a large variety of new applications in high-tech areas, like nanomaterials, are becoming increasingly important. High purity gold (> 99.999 %) is indispensable, since even the smallest contaminants can affect the manufacturing processes as well as the electrical and chemical properties of the material, resulting in hard spots, embrittlement, blistering, discoloration and insufficient properties of the manufactured conductors. Elements to be determined include, depending on materials and processes used, Ag, Pd, Pt, Cu, Cr, Fe, Mg, Ni, Pb, Zn, Be, Ca, and Cd.
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