As @ 1000 µg/mL in 5% HNO3, 100ml

Cyanide (CN-)@1000mg/L in 0.1% NaOH, 100ml

S @ 10000 µg/mL in H2O, 100ml

Mo, 1000 µg/mL in 5% HNO3, tr. HF, 100ml