Volatile Standard

1-Pyrenebutyric acid, neat, Solvent-neat, Unit 1g, # of units-1, Cas.no. 3443-45-6

n-Tetrapentacontane, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 5856-66-6

pH 4.01 buffer solution (box of 25x20mL sachet)