Method 525.2 Solution B

Precision and Recovery Stock Solution: WHO PCBs, 1.2ml, nonane

Glycerol-d5, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 62502-71-0

Ethanol standard in serum,3.0g/L,serum, 1.5mL