Semi-volatiles surrogate with indicator

O-Desmethyl tramadol hydrochloride , 100µg base/mL, Solvent-methanol, Unit 1mL, # of units-5, Cas.no.

Tris(1-chloro-2-propyl) phosphate,neat,neat,10mg,

Toxaphene, 100µg/ml in Acetonitrile, 5ml