Sulfate (SO4-2), 1000µg/ml in Water, 100ml

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

Sulfide (S), 1000µg/mL in Water, 3 x 20ml

Sulfur, 5000µg/g (0.500 wt%) in 75 cSt Mineral Oil, 100ml