Imazapyr, 100 µg/ml, Acetonitrile, 5ml

3 Deuterated Compounds Internal Standard Mix 3 Analytes, each Wt.% as listed; units: 1x10mL, 5x10mL neat Name Wt.% Name Wt.% Benzene-d6 39.7 Naphthalene-d8 20.9 Ethylbenzene-d 10 39.3

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

1,2,3,5-Tetrachlorobenzene, 100 µg/ml, Methanol,