Phosphate (PO4-3) as P, 1000µg/ml in Water, 100ml

CONOSTAN Standard S-21+K, 885 ppm, 200g

Mercury (Hg), 1µg/ml in 2%-HNO3 / Water, 3 x 20ml

Germanium (Ge), 100 µg/mL in 2%-HNO3 / Water, 4x25ml