EPA Method 551.1 Performance Check Soln

Phosphate (PO43-) as P

2,3,4',4'-Tetachlorobiphenyl,100 µg/mL,isooctane,1mL,

Chlorfenvinphos, 100µg/mL, Solvent-c.hexane, Unit 1mL, # of units-1, Cas.no. 470-90-6