Multi-Element Internal Std., 10ug/ml, 4x25ml

Isocaffeine (1,3,9-Trimethylxanthine), neat, Solvent-neat, Unit 25mg, # of units-1, Cas.no. 519-32-4

Calibration Std. #2

Benzo(k)fluoranthene, 1000µg/ml in Acetonitrile, 1