Ni @ 1000 µg/mL in 5% HNO3, 100ml

Fe, 1000 µg/mL in 5% HNO3, 100ml

Li @ 100µg/mL in 2% HNO3 (Enriched in Li-6), 100ml

S @ 10000 µg/mL in H2O, 100ml