Perfluoro-n-[1,2,3,4-13C4]butanoic acid, 50µg/ml in MeOH, 1,2ml

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

4-Nonylphenol diethoxylate, mixture of nonylisomers,100 µg/mL,isooctane,1mL,

Mirex, 100 µg/ml, Acetonitrile, 5ml