Fenoprop, analytical standard (Supelco)

2,4-D 5000 µg/mL in Acetonitrile, analytical standard (Supelco)

2,4-D 100 µg/mL in Methanol, analytical standard (Supelco)

2,4'-DDD, analytical standard (Supelco)

Endrin ketone, analytical standard (Supelco)

Parathion, analytical standard (Supelco)

Chlordane solution in Methanol, analytical standard (Supelco)

gamma-HCH (Lindan) 1000 µg/mL in Methanol, analytical standard (Supelco)

gamma-HCH (Lindan), analytical standard (Supelco)

Dieldrin 1000 µg/mL in Methanol, analytical standard (Supelco)