The PlasmaQuant? MS Elite has been successfully used for the determination of trace impurities in pure 5N Gold. This work demonstrates the benefits of high sensitivity and iCRC interference management in routinely achieving the detection limits necessary to measure gold purity to five nines (5N). In fact, routinely achieving detection limits to determine contaminates in gold of six nines (6N) purity is not far out of reach and would only require slightly cleaner working conditions. 德國耶拿PlasmaQuant ? MS 電感耦合等離子體質譜儀（PlasmaQuant ? MS ICP-MS）