Endosulfan-sulfate, 100 µg/ml, Ethyl acetate, 5m

2,2',3,4',6'-Pentachlorobiphenyl (= 2,2',3',4,6-),100 µg/mL,isooctane,1mL,

ISO 18857-1 4-n-Nonylphenol solution, Calibration standard

Atrazine D5 (ethylamino D5), 1000 µg/mL in Acetonitrile, 1ml