Gun Shot Residue

Metformin hydrochloride, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 1115-70-4

Trichloroacetic acid (TCA), 100µg/ml in MTBE, 5ml

2,5-Dimethylphenanthrene , 50µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 3674-66-6