국가희소금속센터

1) Sensitivity 7Li > 50 Mcps/ppm 115In > 220 Mcps/ppm 238U > 300 Mcps/ppm 2) Background Less than 0.5 counts per second, measured at mass 4.5 3) Detection Limit (ppt) 9Be : < 0.5ppt, 115In < 0.1ppt, 209Bi < 0.1ppt 4) Polyatomics Measured on a 10ppb tune solution - Oxides < 3% CeO/Ce - Double charged < 3% Ba++/Ba+ 5) Stability Long term stability (2 hours) : Li, In and U at 10ppb. Stability < 3% RSD without internal standardisation. Short term stability (10 minutes) : Li, In and U at 10ppb. Stability < 2% RSD without internal standardisation. 6) Isotope Ratio Precision (%RSD) 107Ag / 109Ag : < 0.1%