Carbophenothion, 100 µg/ml, Acetonitrile, 5ml

2-Isopropyl-6-methyl-4-pyrimidinol, 1000µg/ml in Acetonitrile, 1ml

13C6-2,4-D, 100µg/ml in Acetonitrile, 1ml

N-Nitrosodiisopropylamine, 1000µg/mL in MeChl, 1ml