Iohexol, 100 µg/ml in Acetonitrile, 5ml

PCB No. 126, 10µg/ml in Isooctane, 10ml

2,3-Dimethylbenzothiophene, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 4923-91-5

EPA Method 531.1 - Analytes