13C6-Hexachlorobenzene, 100 µg/ml, Cyclohexane,

Chlorfenvinphos, 10.0 µg/ml, Ethyl acetate, 10ml

Irbesartan-d4 (2,3,5,6-phenyl-d4),ca. 100 µg/mL,MeOH,1mL,

1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin , 1.2ml x 50ug/ml, nonane