Semi-Volatile Standard

D-(+)-Gluconic acid delta-lactone, 500mg

1,2,4,5-Tetrachlorobenzene, 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 95-94-3

1,1-Difluoroethane, 20mg/mL in MeOH, 1ml