Carbofuran, 100 µg/ml, Acetonitrile, 5ml

N-Nitroso-4-(2-hydroxyethyl)-piperazin-2-one,1000 µg/mL,acetonitrile,1mL,

2,5-Dichloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane

Acetylsalicylic acid-d4 (ring-d4),100 µg/mL,MeOH,1mL,