Chromium (Cr), 1µg/ml in 2%-HNO3 / Water, 100ml

As @ 1000 µg/mL in 5% HNO3, 100ml

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

Co @ 1000 µg/mL in 5% HNO3, 100ml