L-Alanine-13C3, 25mg

Heptachlor-endo-epoxide (isomer A), 1.2mL x 100ug/mL, nonane

Mesosulfuron-methyl, 10.0 µg/ml, Acetonitrile, 1

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