EPA Method 200.8 Calibration Standard 2

2,3',4,4'-Tetrachlorobiphenyl, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 32598-10-0

Glycyrrhizic acid, 100mg

Isoviolanthrone, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 128-64-3