Internal & Surrogate Standard 8260B

2,3',5,5'-Tetrachlorobiphenyl ,100 µg/mL,isooctane,1mL,

D-Sorbitol, 250mg

Chlorpyrifos, 100µg/mL, Solvent-acetonitrile, Unit 1mL, # of units-1, Cas.no. 2921-88-2