Benzo[a]pyrene-d12,400µg/mL,cyclohexane,1mL,

Nadifloxacin, 100mg

beta-Endosulfan, 100 µg/ml, Methanol, 1ml

Monobenzyl phthalate-3,4,5,6-d4, 100µg/ml in MeOH, 1ml