Butralin, 100 µg/ml, Ethyl acetate, 5ml

Perfluoro-n-[1,2,3,4,5,6,7-13C7]undecanoic acid, 50µg/ml in MeOH, 1,2ml

Perfluoro-4-methyloctanoic acid, 1.2ml x 50ug/ml, methanol

2,3,4,6-Tetrachloroanisole