4,4-DDE standard

17ß(H),21 alpha(H)-(22S)-Tetrakishomohopane , neat, Solvent-neat, Unit ca. 5µg, # of units-1, Cas.no. 79897-70-4

4H-Cyclopenta[def]phenanthrene, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 203-64-5

Glyphosate-FMOC, certified, 50mg