Disulfoton-sulfoxide, 10.0 µg/ml, Acetonitrile,

Perfluoro-n-[1,2-13C2]undecanoic acid, 1.2ml x 50ug/ml, methanol

Thiophene in Toluene Units: 5x1mL ampoule, 1x10mL screw-capped bottle Chiron No. Concentration µgS/g (ppm) Wt.% S-4053-0 Blank 0 S-4053-K 1 000 0.1000 S-4053-2.5K 2 500 0.2500 S-4053-5K

Cerium (Ce)