Sulfur Standard: S @ 10 µg/g (0.0010 wt%) in #2 Diesel Fuel, 100ml

Chlorfenvinphos, 250mg

d2 C27 alpha alpha alpha (20R)-Cholestane, 100µg/mL in Isooctane, 1ml

1,2,4,5-Tetramethylbenzene