Profluralin, 10.0 µg/ml, Ethyl acetate, 10ml

2,3,4,5-Tetrabromobenzoic acid [13C6 ring], 1.2ml x 50ug/ml, methanol

1-Isopropyl-3-phenylurea, 25mg

Sulfaguanidine monohydrate, 100 µg/ml, Methanol,