Cr, 1000 µg/mL in 5% HNO3, 100ml

Sulfur Blank (0 wt%) in 75 cSt Mineral Oil, 100ml

Phosphate (PO4-3) as P, 1000µg/ml in Water, 500ml

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