Caffeine, 100 µg/ml, Methanol, 1ml

Sodium 1H,1H,2H,2H-perfluoro(1,2-13C2)dodecanesulfonate (10:2), 50µg/ml in MeOH, 1,2ml

EPA Method 8270C - B/N Matrix Spiking Solution

n-Hydrocarbon Mix #3