6-Methylchrysene, 100 µg/ml, Acetonitrile, 5ml

2,3,3',4,4',5-Hexachloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane

Kresoxim-methyl, 10 µg/ml, Ethyl acetate, 10ml

(±)-Vanillomandelic acid-d3,100 µg/mL,MeOH,1mL,