Cr @ 1000 µg/mL in 5% HCl, 100ml

Sulfur, 1000ug/ml, 100ml

Method 200.8/1638/1640 Internal Standard, 10µg/ml in 2%-HNO3, 4x25ml

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