Instrument Standard 2

2,2,3,4,5,6-Hexachlorobiphenyl,BZ-143

epsilon-HCH (BHC), 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 6108-10-7

Silica (SiO2)