2,2'-Difluorobiphenyl (PFB 4), analytical standard (Supelco)

Nalidixic acid, analytical standard

7alpha-Hydroxy-4-cholesten-3-one, analytical standard

Endosulfan-lacton, analytical standard (Supelco)

Monoquat iodide, analytical standard

1,4-Dichlorobenzene D4 2000 µg/mL in Methanol, analytical standard (Supelco)

1,4-Dichlorobenzene D4 2000 µg/mL in Methylene chloride (Dichloromethane), analytical standard (Supelco)

7alpha-Hydroxy-4-cholesten-3-one, analytical standard

8-Mercaptomenthone, Mixture of Isomers, analytical standard

8-Mercaptomenthone, Mixture of Isomers, analytical standard