Surrogate Standard Solution 1 component (EPA 515) 2,4-D-methyl ester 5000 µg/mL in Methanol

OCs Standard Solution 1 component (EPA 617) Chlordane 1000 µg/mL in Iso-octane

OCs Standard Solution 1 component (EPA 617) Camphechlor (Toxaphene) 1000 µg/mL in Iso-octane

2,4-D, analytical standard (Supelco)

Endosulfan-I (alpha), analytical standard (Supelco)

cis-Chlordane (alpha), analytical standard (Supelco)

trans-Chlordane (gamma), analytical standard (Supelco)

Chlorpyrifos 100 ng/µL in Acetonitrile, analytical standard

Chlorpyrifos 100 ng/µL in Acetonitrile, analytical standard

Heptachlor-endo-epoxide (trans-, isomer A) in Methanol, analytical standard