Flucycloxuron, 100 µg/ml, Acetonitrile, 1ml

2,2',4,4'-Tetrabromo-6-methoxy[13C12]diphenyl ether, 1.2ml x 50ug/ml, nonane

Hydroxytolbutamide-d9 (butyl-d9),neat,neat,10mg

EPA Method 528 Internal Standard