Atrazine-2-hydroxy, 100mg

Ethyl 4-hydroxybenzoate, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 120-47-8

17 alpha(H),21ß(H)-(22S)-Tetrakishomohopane , neat, Solvent-neat, Unit ca. 10µg , # of units-1, Cas.no. 67069-13-0

Tris(2-ethylhexyl) phosphate, 100µg/ml, MeOH, 5ml