Extended Calibration/Low Level Solution , 500ul, nonane

Diphenyl-o-tolyl phoshate,100 µg/mL,isooctane,1mL,

Tramadol-d6 hydrochloride, 100µg base/mL, Solvent-methanol, Unit 1mL, # of units-5, Cas.no.

Surrogate Standard Stock Solution, 1.2ml, nonane