Atrazine, 10.0 µg/ml, Acetonitrile, 10ml

MCPA methyl ester & MCPP methyl ester, 2.0mg/mL in Hexane

Crotoxyphos, 1000µg/ml in in hexane:acetone [9:1], 1ml

Ethoprophos, 100 µg/ml, Toluene, 1ml