Initial Check Verif. Standard 4, in 4%HNO3, 100ml

2,2,4a,7,8-Pentamethyl-cis-decaline; C15 Bicyclic terpane, ca. 20 µg/mL, Solvent-isooctane, Unit 0.25µL, # of units-1, Cas.no.

Syringic acid, neat, Solvent-neat, Unit 1g, # of units-1, Cas.no. 530-57-4

Heptadecafluorooctanesulfonic acid potassium salt,