Cr, 1000 µg/mL in 5% HNO3, 100ml

Phosphorus, 10,000ug/ml, 100ml

Phosphate (PO4-3) as P, 1000µg/ml in Water, 500ml

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