Zn, 1000 µg/mL in 5% HNO3, 100ml

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

Arsenic Standard: 1000 µg/g As in 75 cSt Hydrocarbon Oil, 50g

Tl, 1000 µg/mL in 5% HNO3, 100ml