Chloride (Cl-), 1000µg/mL in Water, 500ml

Cu @ 1000 µg/mL in 5% HNO3, 100ml

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

Sulfur, 1500µg/g (0.150 wt%) in 75 cSt Mineral Oil, 100ml