Ethanol standard in water,0.8g/L,water, 1.5mL

Codeine-N-methyl-d3 hydrochloride, 50µg base/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no.

7H-Perfluoroheptanoic acid, 50µg/ml in MeOH, 1ml

Guanidine nitrate