Al @ 10µg/mL Mg @ 20µg/mL Ca @ 32µg/mL Cu, Fe, Pb, Zn @ 50µg/mL B @ 1000µg/mL P @ 2000µg/mL K @ 5000µg/mL Na @ 10,000µg/mL in 3% HNO3 (v/v), 500mL. 500ml