Dibenzylsulfide

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

1,1,1-Trichloro-2,2-bis[4-chloro(13C6)phenyl]ethane, 1.2mL x 100ug/mL, nonane

2,2',3,5,6'-Pentachlorobiphenyl,100 µg/mL,isooctane,1mL,