Cr @ 1000 µg/mL in 5% HCl, 100ml

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

Complex Cyanide (CN-), 1000µg/ml in Tr. NaOH / Water, 100ml

Sn @ 10000 µg/mL in 5% HNO3, tr. HF, 100ml