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

6,6'-Dihydroxy-5,5'-dimethoxybiphenyl-3,3'-dicarbo

Mo, 1000 µg/mL in 5% HNO3, tr. HF, 100ml

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