Designed to contain virtually every element in the mass spectrum for concentration checks. Multi-element Calibration Standard 2, Matrix per Volume: 5% HNO3 per 100 mL, Concentration of Element: 10 µg/mL Cerium, 10 µg/mL Dysprosium, 10 µg/mL Erbium, 10 µg/mL Europium, 10 µg/mL Gadolinium,...