PSA-C18-Mix 3

Sodium 1H,1H,2H,2H-perfluoro-1-[1,2-13C2]-hexane sulfonate (4:2), 50µg/ml in MeOH, 1,2ml

DEET, 100µg/mL in Methanol, 1ml

Glycolic acid (C2H4O3)